Migrate tests without any cleanup, or modifying test logic in anyway to
run under KUnit using the KUnit expectation and assertion API.

Signed-off-by: Brendan Higgins <brendanhigg...@google.com>
---
 drivers/of/Kconfig    |    1 +
 drivers/of/unittest.c | 1405 ++++++++++++++++++++++-------------------
 2 files changed, 752 insertions(+), 654 deletions(-)

diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index ad3fcad4d75b8..f309399deac20 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -15,6 +15,7 @@ if OF
 config OF_UNITTEST
        bool "Device Tree runtime unit tests"
        depends on !SPARC
+       depends on KUNIT
        select IRQ_DOMAIN
        select OF_EARLY_FLATTREE
        select OF_RESOLVE
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 41b49716ac75f..a5ef44730ffdb 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -26,186 +26,187 @@
 
 #include <linux/bitops.h>
 
+#include <kunit/test.h>
+
 #include "of_private.h"
 
-static struct unittest_results {
-       int passed;
-       int failed;
-} unittest_results;
-
-#define unittest(result, fmt, ...) ({ \
-       bool failed = !(result); \
-       if (failed) { \
-               unittest_results.failed++; \
-               pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); 
\
-       } else { \
-               unittest_results.passed++; \
-               pr_debug("pass %s():%i\n", __func__, __LINE__); \
-       } \
-       failed; \
-})
-
-static void __init of_unittest_find_node_by_name(void)
+static void of_unittest_find_node_by_name(struct kunit *test)
 {
        struct device_node *np;
        const char *options, *name;
 
        np = of_find_node_by_path("/testcase-data");
        name = kasprintf(GFP_KERNEL, "%pOF", np);
-       unittest(np && !strcmp("/testcase-data", name),
-               "find /testcase-data failed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+       KUNIT_EXPECT_STREQ_MSG(test, "/testcase-data", name,
+                              "find /testcase-data failed\n");
        of_node_put(np);
        kfree(name);
 
        /* Test if trailing '/' works */
-       np = of_find_node_by_path("/testcase-data/");
-       unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
+       KUNIT_EXPECT_EQ_MSG(test, of_find_node_by_path("/testcase-data/"), NULL,
+                           "trailing '/' on /testcase-data/ should fail\n");
 
        np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
        name = kasprintf(GFP_KERNEL, "%pOF", np);
-       unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
-               "find /testcase-data/phandle-tests/consumer-a failed\n");
+       KUNIT_EXPECT_STREQ_MSG(test,
+                              "/testcase-data/phandle-tests/consumer-a", name,
+                              "find /testcase-data/phandle-tests/consumer-a 
failed\n");
        of_node_put(np);
        kfree(name);
 
        np = of_find_node_by_path("testcase-alias");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
        name = kasprintf(GFP_KERNEL, "%pOF", np);
-       unittest(np && !strcmp("/testcase-data", name),
-               "find testcase-alias failed\n");
+       KUNIT_EXPECT_STREQ_MSG(test, "/testcase-data", name,
+                              "find testcase-alias failed\n");
        of_node_put(np);
        kfree(name);
 
        /* Test if trailing '/' works on aliases */
-       np = of_find_node_by_path("testcase-alias/");
-       unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
+       KUNIT_EXPECT_EQ_MSG(test, of_find_node_by_path("testcase-alias/"), NULL,
+                           "trailing '/' on testcase-alias/ should fail\n");
 
        np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
        name = kasprintf(GFP_KERNEL, "%pOF", np);
-       unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
-               "find testcase-alias/phandle-tests/consumer-a failed\n");
+       KUNIT_EXPECT_STREQ_MSG(test,
+                              "/testcase-data/phandle-tests/consumer-a", name,
+                              "find testcase-alias/phandle-tests/consumer-a 
failed\n");
        of_node_put(np);
        kfree(name);
 
-       np = of_find_node_by_path("/testcase-data/missing-path");
-       unittest(!np, "non-existent path returned node %pOF\n", np);
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_find_node_by_path("/testcase-data/missing-path"),
+                           NULL,
+                           "non-existent path returned node %pOF\n", np);
        of_node_put(np);
 
-       np = of_find_node_by_path("missing-alias");
-       unittest(!np, "non-existent alias returned node %pOF\n", np);
+       KUNIT_EXPECT_EQ_MSG(test, of_find_node_by_path("missing-alias"), NULL,
+                           "non-existent alias returned node %pOF\n", np);
        of_node_put(np);
 
-       np = of_find_node_by_path("testcase-alias/missing-path");
-       unittest(!np, "non-existent alias with relative path returned node 
%pOF\n", np);
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_find_node_by_path("testcase-alias/missing-path"),
+                           NULL,
+                           "non-existent alias with relative path returned 
node %pOF\n",
+                           np);
        of_node_put(np);
 
        np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
-       unittest(np && !strcmp("testoption", options),
-                "option path test failed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+       KUNIT_EXPECT_STREQ_MSG(test, "testoption", options,
+                              "option path test failed\n");
        of_node_put(np);
 
        np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
-       unittest(np && !strcmp("test/option", options),
-                "option path test, subcase #1 failed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+       KUNIT_EXPECT_STREQ_MSG(test, "test/option", options,
+                              "option path test, subcase #1 failed\n");
        of_node_put(np);
 
        np = 
of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", 
&options);
-       unittest(np && !strcmp("test/option", options),
-                "option path test, subcase #2 failed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+       KUNIT_EXPECT_STREQ_MSG(test, "test/option", options,
+                              "option path test, subcase #2 failed\n");
        of_node_put(np);
 
        np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
-       unittest(np, "NULL option path test failed\n");
+       KUNIT_EXPECT_NOT_ERR_OR_NULL_MSG(test, np,
+                                        "NULL option path test failed\n");
        of_node_put(np);
 
        np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
                                       &options);
-       unittest(np && !strcmp("testaliasoption", options),
-                "option alias path test failed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+       KUNIT_EXPECT_STREQ_MSG(test, "testaliasoption", options,
+                              "option alias path test failed\n");
        of_node_put(np);
 
        np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
                                       &options);
-       unittest(np && !strcmp("test/alias/option", options),
-                "option alias path test, subcase #1 failed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+       KUNIT_EXPECT_STREQ_MSG(test, "test/alias/option", options,
+                              "option alias path test, subcase #1 failed\n");
        of_node_put(np);
 
        np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
-       unittest(np, "NULL option alias path test failed\n");
+       KUNIT_EXPECT_NOT_ERR_OR_NULL_MSG(test, np,
+                                        "NULL option alias path test 
failed\n");
        of_node_put(np);
 
        options = "testoption";
        np = of_find_node_opts_by_path("testcase-alias", &options);
-       unittest(np && !options, "option clearing test failed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+       KUNIT_EXPECT_EQ_MSG(test, options, NULL,
+                           "option clearing test failed\n");
        of_node_put(np);
 
        options = "testoption";
        np = of_find_node_opts_by_path("/", &options);
-       unittest(np && !options, "option clearing root node test failed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+       KUNIT_EXPECT_EQ_MSG(test, options, NULL,
+                           "option clearing root node test failed\n");
        of_node_put(np);
 }
 
-static void __init of_unittest_dynamic(void)
+static void of_unittest_dynamic(struct kunit *test)
 {
        struct device_node *np;
        struct property *prop;
 
        np = of_find_node_by_path("/testcase-data");
-       if (!np) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
 
        /* Array of 4 properties for the purpose of testing */
        prop = kcalloc(4, sizeof(*prop), GFP_KERNEL);
-       if (!prop) {
-               unittest(0, "kzalloc() failed\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, prop);
 
        /* Add a new property - should pass*/
        prop->name = "new-property";
        prop->value = "new-property-data";
        prop->length = strlen(prop->value) + 1;
-       unittest(of_add_property(np, prop) == 0, "Adding a new property 
failed\n");
+       KUNIT_EXPECT_EQ_MSG(test, of_add_property(np, prop), 0,
+                           "Adding a new property failed\n");
 
        /* Try to add an existing property - should fail */
        prop++;
        prop->name = "new-property";
        prop->value = "new-property-data-should-fail";
        prop->length = strlen(prop->value) + 1;
-       unittest(of_add_property(np, prop) != 0,
-                "Adding an existing property should have failed\n");
+       KUNIT_EXPECT_NE_MSG(test, of_add_property(np, prop), 0,
+                           "Adding an existing property should have failed\n");
 
        /* Try to modify an existing property - should pass */
        prop->value = "modify-property-data-should-pass";
        prop->length = strlen(prop->value) + 1;
-       unittest(of_update_property(np, prop) == 0,
-                "Updating an existing property should have passed\n");
+       KUNIT_EXPECT_EQ_MSG(test, of_update_property(np, prop), 0,
+                           "Updating an existing property should have 
passed\n");
 
        /* Try to modify non-existent property - should pass*/
        prop++;
        prop->name = "modify-property";
        prop->value = "modify-missing-property-data-should-pass";
        prop->length = strlen(prop->value) + 1;
-       unittest(of_update_property(np, prop) == 0,
-                "Updating a missing property should have passed\n");
+       KUNIT_EXPECT_EQ_MSG(test, of_update_property(np, prop), 0,
+                           "Updating a missing property should have passed\n");
 
        /* Remove property - should pass */
-       unittest(of_remove_property(np, prop) == 0,
-                "Removing a property should have passed\n");
+       KUNIT_EXPECT_EQ_MSG(test, of_remove_property(np, prop), 0,
+                           "Removing a property should have passed\n");
 
        /* Adding very large property - should pass */
        prop++;
        prop->name = "large-property-PAGE_SIZEx8";
        prop->length = PAGE_SIZE * 8;
        prop->value = kzalloc(prop->length, GFP_KERNEL);
-       unittest(prop->value != NULL, "Unable to allocate large buffer\n");
-       if (prop->value)
-               unittest(of_add_property(np, prop) == 0,
-                        "Adding a large property should have passed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, prop->value);
+       KUNIT_EXPECT_EQ_MSG(test, of_add_property(np, prop), 0,
+                           "Adding a large property should have passed\n");
 }
 
-static int __init of_unittest_check_node_linkage(struct device_node *np)
+static int of_unittest_check_node_linkage(struct device_node *np)
 {
        struct device_node *child;
        int count = 0, rc;
@@ -230,27 +231,29 @@ static int __init of_unittest_check_node_linkage(struct 
device_node *np)
        return rc;
 }
 
-static void __init of_unittest_check_tree_linkage(void)
+static void of_unittest_check_tree_linkage(struct kunit *test)
 {
        struct device_node *np;
        int allnode_count = 0, child_count;
 
-       if (!of_root)
-               return;
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, of_root);
 
        for_each_of_allnodes(np)
                allnode_count++;
        child_count = of_unittest_check_node_linkage(of_root);
 
-       unittest(child_count > 0, "Device node data structure is corrupted\n");
-       unittest(child_count == allnode_count,
-                "allnodes list size (%i) doesn't match sibling lists size 
(%i)\n",
-                allnode_count, child_count);
+       KUNIT_EXPECT_GT_MSG(test, child_count, 0,
+                           "Device node data structure is corrupted\n");
+       KUNIT_EXPECT_EQ_MSG(test, child_count, allnode_count,
+                           "allnodes list size (%i) doesn't match sibling 
lists size (%i)\n",
+                           allnode_count, child_count);
        pr_debug("allnodes list size (%i); sibling lists size (%i)\n", 
allnode_count, child_count);
 }
 
-static void __init of_unittest_printf_one(struct device_node *np, const char 
*fmt,
-                                         const char *expected)
+static void of_unittest_printf_one(struct kunit *test,
+                                  struct device_node *np,
+                                  const char *fmt,
+                                  const char *expected)
 {
        unsigned char *buf;
        int buf_size;
@@ -266,9 +269,12 @@ static void __init of_unittest_printf_one(struct 
device_node *np, const char *fm
        size = snprintf(buf, buf_size - 2, fmt, np);
 
        /* use strcmp() instead of strncmp() here to be absolutely sure strings 
match */
-       unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
-               "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
-               fmt, expected, buf);
+       KUNIT_EXPECT_STREQ_MSG(test, buf, expected,
+                              "sprintf failed; fmt='%s' expected='%s' 
rslt='%s'\n",
+                              fmt, expected, buf);
+       KUNIT_EXPECT_EQ_MSG(test, buf[size+1], 0xff,
+                           "sprintf failed; fmt='%s' expected='%s' 
rslt='%s'\n",
+                           fmt, expected, buf);
 
        /* Make sure length limits work */
        size++;
@@ -276,40 +282,43 @@ static void __init of_unittest_printf_one(struct 
device_node *np, const char *fm
                /* Clear the buffer, and make sure it works correctly still */
                memset(buf, 0xff, buf_size);
                snprintf(buf, size+1, fmt, np);
-               unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 
0xff),
-                       "snprintf failed; size=%i fmt='%s' expected='%s' 
rslt='%s'\n",
-                       size, fmt, expected, buf);
+               KUNIT_EXPECT_STREQ_MSG(test, buf, expected,
+                                      "snprintf failed; size=%i fmt='%s' 
expected='%s' rslt='%s'\n",
+                                      size, fmt, expected, buf);
+               KUNIT_EXPECT_EQ_MSG(test, buf[size+1], 0xff,
+                                   "snprintf failed; size=%i fmt='%s' 
expected='%s' rslt='%s'\n",
+                                   size, fmt, expected, buf);
        }
        kfree(buf);
 }
 
-static void __init of_unittest_printf(void)
+static void of_unittest_printf(struct kunit *test)
 {
        struct device_node *np;
        const char *full_name = 
"/testcase-data/platform-tests/test-device@1/dev@100";
        char phandle_str[16] = "";
 
        np = of_find_node_by_path(full_name);
-       if (!np) {
-               unittest(np, "testcase data missing\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
 
        num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0);
 
-       of_unittest_printf_one(np, "%pOF",  full_name);
-       of_unittest_printf_one(np, "%pOFf", full_name);
-       of_unittest_printf_one(np, "%pOFp", phandle_str);
-       of_unittest_printf_one(np, "%pOFP", "dev@100");
-       of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
-       of_unittest_printf_one(np, "%10pOFP", "   dev@100");
-       of_unittest_printf_one(np, "%-10pOFP", "dev@100   ");
-       of_unittest_printf_one(of_root, "%pOFP", "/");
-       of_unittest_printf_one(np, "%pOFF", "----");
-       of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
-       of_unittest_printf_one(np, "%pOFPFPc", 
"dev@100:----:dev@100:test-sub-device");
-       of_unittest_printf_one(np, "%pOFc", "test-sub-device");
-       of_unittest_printf_one(np, "%pOFC",
+       of_unittest_printf_one(test, np, "%pOF",  full_name);
+       of_unittest_printf_one(test, np, "%pOFf", full_name);
+       of_unittest_printf_one(test, np, "%pOFp", phandle_str);
+       of_unittest_printf_one(test, np, "%pOFP", "dev@100");
+       of_unittest_printf_one(test, np, "ABC %pOFP ABC", "ABC dev@100 ABC");
+       of_unittest_printf_one(test, np, "%10pOFP", "   dev@100");
+       of_unittest_printf_one(test, np, "%-10pOFP", "dev@100   ");
+       of_unittest_printf_one(test, of_root, "%pOFP", "/");
+       of_unittest_printf_one(test, np, "%pOFF", "----");
+       of_unittest_printf_one(test, np, "%pOFPF", "dev@100:----");
+       of_unittest_printf_one(test,
+                              np,
+                              "%pOFPFPc",
+                              "dev@100:----:dev@100:test-sub-device");
+       of_unittest_printf_one(test, np, "%pOFc", "test-sub-device");
+       of_unittest_printf_one(test, np, "%pOFC",
                        
"\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
 }
 
@@ -319,7 +328,7 @@ struct node_hash {
 };
 
 static DEFINE_HASHTABLE(phandle_ht, 8);
-static void __init of_unittest_check_phandles(void)
+static void of_unittest_check_phandles(struct kunit *test)
 {
        struct device_node *np;
        struct node_hash *nh;
@@ -331,24 +340,25 @@ static void __init of_unittest_check_phandles(void)
                        continue;
 
                hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
+                       KUNIT_EXPECT_NE_MSG(test, nh->np->phandle, np->phandle,
+                                           "Duplicate phandle! %i used by %pOF 
and %pOF\n",
+                                           np->phandle, nh->np, np);
                        if (nh->np->phandle == np->phandle) {
-                               pr_info("Duplicate phandle! %i used by %pOF and 
%pOF\n",
-                                       np->phandle, nh->np, np);
                                dup_count++;
                                break;
                        }
                }
 
                nh = kzalloc(sizeof(*nh), GFP_KERNEL);
-               if (WARN_ON(!nh))
-                       return;
+               KUNIT_ASSERT_NOT_ERR_OR_NULL(test, nh);
 
                nh->np = np;
                hash_add(phandle_ht, &nh->node, np->phandle);
                phandle_count++;
        }
-       unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
-                dup_count, phandle_count);
+       KUNIT_EXPECT_EQ_MSG(test, dup_count, 0,
+                           "Found %i duplicates in %i phandles\n",
+                           dup_count, phandle_count);
 
        /* Clean up */
        hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
@@ -357,20 +367,22 @@ static void __init of_unittest_check_phandles(void)
        }
 }
 
-static void __init of_unittest_parse_phandle_with_args(void)
+static void of_unittest_parse_phandle_with_args(struct kunit *test)
 {
        struct device_node *np;
        struct of_phandle_args args;
-       int i, rc;
+       int i, rc = 0;
 
        np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-       if (!np) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
 
-       rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
-       unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 
7\n", rc);
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_count_phandle_with_args(np,
+                                                      "phandle-list",
+                                                      "#phandle-cells"),
+                           7,
+                           "of_count_phandle_with_args() returned %i, expected 
7\n",
+                           rc);
 
        for (i = 0; i < 8; i++) {
                bool passed = true;
@@ -423,81 +435,90 @@ static void __init 
of_unittest_parse_phandle_with_args(void)
                        passed = false;
                }
 
-               unittest(passed, "index %i - data error on node %pOF rc=%i\n",
-                        i, args.np, rc);
+               KUNIT_EXPECT_TRUE_MSG(test, passed,
+                                     "index %i - data error on node %pOF 
rc=%i\n",
+                                     i, args.np, rc);
        }
 
        /* Check for missing list property */
-       rc = of_parse_phandle_with_args(np, "phandle-list-missing",
-                                       "#phandle-cells", 0, &args);
-       unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
-       rc = of_count_phandle_with_args(np, "phandle-list-missing",
-                                       "#phandle-cells");
-       unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
+       KUNIT_EXPECT_EQ(test,
+                       of_parse_phandle_with_args(np,
+                                                  "phandle-list-missing",
+                                                  "#phandle-cells",
+                                                  0, &args),
+                       -ENOENT);
+       KUNIT_EXPECT_EQ(test,
+                       of_count_phandle_with_args(np,
+                                                  "phandle-list-missing",
+                                                  "#phandle-cells"),
+                       -ENOENT);
 
        /* Check for missing cells property */
-       rc = of_parse_phandle_with_args(np, "phandle-list",
-                                       "#phandle-cells-missing", 0, &args);
-       unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-       rc = of_count_phandle_with_args(np, "phandle-list",
-                                       "#phandle-cells-missing");
-       unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+       KUNIT_EXPECT_EQ(test,
+                       of_parse_phandle_with_args(np,
+                                                  "phandle-list",
+                                                  "#phandle-cells-missing",
+                                                  0, &args),
+                       -EINVAL);
+       KUNIT_EXPECT_EQ(test,
+                       of_count_phandle_with_args(np,
+                                                  "phandle-list",
+                                                  "#phandle-cells-missing"),
+                       -EINVAL);
 
        /* Check for bad phandle in list */
-       rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
-                                       "#phandle-cells", 0, &args);
-       unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-       rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
-                                       "#phandle-cells");
-       unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+       KUNIT_EXPECT_EQ(test,
+                       of_parse_phandle_with_args(np,
+                                                  "phandle-list-bad-phandle",
+                                                  "#phandle-cells",
+                                                  0, &args),
+                       -EINVAL);
+       KUNIT_EXPECT_EQ(test,
+                       of_count_phandle_with_args(np,
+                                                  "phandle-list-bad-phandle",
+                                                  "#phandle-cells"),
+                       -EINVAL);
 
        /* Check for incorrectly formed argument list */
-       rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
-                                       "#phandle-cells", 1, &args);
-       unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-       rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
-                                       "#phandle-cells");
-       unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+       KUNIT_EXPECT_EQ(test,
+                       of_parse_phandle_with_args(np,
+                                                  "phandle-list-bad-args",
+                                                  "#phandle-cells",
+                                                  1, &args),
+                       -EINVAL);
+       KUNIT_EXPECT_EQ(test,
+                       of_count_phandle_with_args(np,
+                                                  "phandle-list-bad-args",
+                                                  "#phandle-cells"),
+                       -EINVAL);
 }
 
-static void __init of_unittest_parse_phandle_with_args_map(void)
+static void of_unittest_parse_phandle_with_args_map(struct kunit *test)
 {
        struct device_node *np, *p0, *p1, *p2, *p3;
        struct of_phandle_args args;
        int i, rc;
 
        np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
-       if (!np) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
 
        p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
-       if (!p0) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, p0);
 
        p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
-       if (!p1) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, p1);
 
        p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
-       if (!p2) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, p2);
 
        p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
-       if (!p3) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, p3);
 
-       rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
-       unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 
7\n", rc);
+       KUNIT_EXPECT_EQ(test,
+                      of_count_phandle_with_args(np,
+                                                 "phandle-list",
+                                                 "#phandle-cells"),
+                      7);
 
        for (i = 0; i < 8; i++) {
                bool passed = true;
@@ -554,117 +575,214 @@ static void __init 
of_unittest_parse_phandle_with_args_map(void)
                        passed = false;
                }
 
-               unittest(passed, "index %i - data error on node %s rc=%i\n",
-                        i, args.np->full_name, rc);
+               KUNIT_EXPECT_TRUE_MSG(test, passed,
+                                     "index %i - data error on node %s 
rc=%i\n",
+                                     i, args.np->full_name, rc);
        }
 
        /* Check for missing list property */
-       rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
-                                           "phandle", 0, &args);
-       unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
+       KUNIT_EXPECT_EQ(test,
+                       of_parse_phandle_with_args_map(np,
+                                                      "phandle-list-missing",
+                                                      "phandle",
+                                                      0, &args),
+                       -ENOENT);
 
        /* Check for missing cells,map,mask property */
-       rc = of_parse_phandle_with_args_map(np, "phandle-list",
-                                           "phandle-missing", 0, &args);
-       unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+       KUNIT_EXPECT_EQ(test,
+                       of_parse_phandle_with_args_map(np,
+                                                      "phandle-list",
+                                                      "phandle-missing",
+                                                      0, &args),
+                       -EINVAL);
 
        /* Check for bad phandle in list */
-       rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
-                                           "phandle", 0, &args);
-       unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+       KUNIT_EXPECT_EQ(test,
+                       of_parse_phandle_with_args_map(np,
+                                                      
"phandle-list-bad-phandle",
+                                                      "phandle",
+                                                      0, &args),
+                       -EINVAL);
 
        /* Check for incorrectly formed argument list */
-       rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
-                                           "phandle", 1, &args);
-       unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+       KUNIT_EXPECT_EQ(test,
+                       of_parse_phandle_with_args_map(np,
+                                                      "phandle-list-bad-args",
+                                                      "phandle",
+                                                      1, &args),
+                       -EINVAL);
 }
 
-static void __init of_unittest_property_string(void)
+static void of_unittest_property_string(struct kunit *test)
 {
        const char *strings[4];
        struct device_node *np;
        int rc;
 
        np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-       if (!np) {
-               pr_err("No testcase data in device tree\n");
-               return;
-       }
-
-       rc = of_property_match_string(np, "phandle-list-names", "first");
-       unittest(rc == 0, "first expected:0 got:%i\n", rc);
-       rc = of_property_match_string(np, "phandle-list-names", "second");
-       unittest(rc == 1, "second expected:1 got:%i\n", rc);
-       rc = of_property_match_string(np, "phandle-list-names", "third");
-       unittest(rc == 2, "third expected:2 got:%i\n", rc);
-       rc = of_property_match_string(np, "phandle-list-names", "fourth");
-       unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
-       rc = of_property_match_string(np, "missing-property", "blah");
-       unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
-       rc = of_property_match_string(np, "empty-property", "blah");
-       unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
-       rc = of_property_match_string(np, "unterminated-string", "blah");
-       unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+
+       KUNIT_EXPECT_EQ(test,
+                       of_property_match_string(np,
+                                                "phandle-list-names",
+                                                "first"),
+                       0);
+       KUNIT_EXPECT_EQ(test,
+                       of_property_match_string(np,
+                                                "phandle-list-names",
+                                                "second"),
+                       1);
+       KUNIT_EXPECT_EQ(test,
+                       of_property_match_string(np,
+                                                "phandle-list-names",
+                                                "third"),
+                       2);
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_property_match_string(np,
+                                                    "phandle-list-names",
+                                                    "fourth"),
+                           -ENODATA,
+                           "unmatched string");
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_property_match_string(np,
+                                                    "missing-property",
+                                                    "blah"),
+                           -EINVAL,
+                           "missing property");
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_property_match_string(np,
+                                                    "empty-property",
+                                                    "blah"),
+                           -ENODATA,
+                           "empty property");
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_property_match_string(np,
+                                                    "unterminated-string",
+                                                    "blah"),
+                           -EILSEQ,
+                           "unterminated string");
 
        /* of_property_count_strings() tests */
-       rc = of_property_count_strings(np, "string-property");
-       unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
-       rc = of_property_count_strings(np, "phandle-list-names");
-       unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
-       rc = of_property_count_strings(np, "unterminated-string");
-       unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
-       rc = of_property_count_strings(np, "unterminated-string-list");
-       unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
+       KUNIT_EXPECT_EQ(test,
+                       of_property_count_strings(np, "string-property"),
+                       1);
+       KUNIT_EXPECT_EQ(test,
+                       of_property_count_strings(np, "phandle-list-names"),
+                       3);
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_property_count_strings(np,
+                                                     "unterminated-string"),
+                           -EILSEQ,
+                           "unterminated string");
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_property_count_strings(
+                                           np,
+                                           "unterminated-string-list"),
+                           -EILSEQ,
+                           "unterminated string array");
 
        /* of_property_read_string_index() tests */
        rc = of_property_read_string_index(np, "string-property", 0, strings);
-       unittest(rc == 0 && !strcmp(strings[0], "foobar"), 
"of_property_read_string_index() failure; rc=%i\n", rc);
+       KUNIT_ASSERT_EQ(test, rc, 0);
+       KUNIT_EXPECT_STREQ(test, strings[0], "foobar");
        strings[0] = NULL;
        rc = of_property_read_string_index(np, "string-property", 1, strings);
-       unittest(rc == -ENODATA && strings[0] == NULL, 
"of_property_read_string_index() failure; rc=%i\n", rc);
-       rc = of_property_read_string_index(np, "phandle-list-names", 0, 
strings);
-       unittest(rc == 0 && !strcmp(strings[0], "first"), 
"of_property_read_string_index() failure; rc=%i\n", rc);
-       rc = of_property_read_string_index(np, "phandle-list-names", 1, 
strings);
-       unittest(rc == 0 && !strcmp(strings[0], "second"), 
"of_property_read_string_index() failure; rc=%i\n", rc);
-       rc = of_property_read_string_index(np, "phandle-list-names", 2, 
strings);
-       unittest(rc == 0 && !strcmp(strings[0], "third"), 
"of_property_read_string_index() failure; rc=%i\n", rc);
+       KUNIT_EXPECT_EQ(test, rc, -ENODATA);
+       KUNIT_EXPECT_EQ(test, strings[0], NULL);
+       rc = of_property_read_string_index(np,
+                                          "phandle-list-names",
+                                          0,
+                                          strings);
+       KUNIT_ASSERT_EQ(test, rc, 0);
+       KUNIT_EXPECT_STREQ(test, strings[0], "first");
+       rc = of_property_read_string_index(np,
+                                          "phandle-list-names",
+                                          1,
+                                          strings);
+       KUNIT_ASSERT_EQ(test, rc, 0);
+       KUNIT_EXPECT_STREQ(test, strings[0], "second");
+       rc = of_property_read_string_index(np,
+                                          "phandle-list-names",
+                                          2,
+                                          strings);
+       KUNIT_ASSERT_EQ(test, rc, 0);
+       KUNIT_EXPECT_STREQ(test, strings[0], "third");
        strings[0] = NULL;
-       rc = of_property_read_string_index(np, "phandle-list-names", 3, 
strings);
-       unittest(rc == -ENODATA && strings[0] == NULL, 
"of_property_read_string_index() failure; rc=%i\n", rc);
+       rc = of_property_read_string_index(np,
+                                          "phandle-list-names", 3, strings);
+       KUNIT_EXPECT_EQ(test, rc, -ENODATA);
+       KUNIT_EXPECT_EQ(test, strings[0], NULL);
        strings[0] = NULL;
-       rc = of_property_read_string_index(np, "unterminated-string", 0, 
strings);
-       unittest(rc == -EILSEQ && strings[0] == NULL, 
"of_property_read_string_index() failure; rc=%i\n", rc);
-       rc = of_property_read_string_index(np, "unterminated-string-list", 0, 
strings);
-       unittest(rc == 0 && !strcmp(strings[0], "first"), 
"of_property_read_string_index() failure; rc=%i\n", rc);
+       rc = of_property_read_string_index(np,
+                                          "unterminated-string",
+                                          0,
+                                          strings);
+       KUNIT_EXPECT_EQ(test, rc, -EILSEQ);
+       KUNIT_EXPECT_EQ(test, strings[0], NULL);
+       rc = of_property_read_string_index(np,
+                                          "unterminated-string-list",
+                                          0,
+                                          strings);
+       KUNIT_ASSERT_EQ(test, rc, 0);
+       KUNIT_EXPECT_STREQ(test, strings[0], "first");
        strings[0] = NULL;
-       rc = of_property_read_string_index(np, "unterminated-string-list", 2, 
strings); /* should fail */
-       unittest(rc == -EILSEQ && strings[0] == NULL, 
"of_property_read_string_index() failure; rc=%i\n", rc);
-       strings[1] = NULL;
+       rc = of_property_read_string_index(np,
+                                          "unterminated-string-list",
+                                          2,
+                                          strings); /* should fail */
+       KUNIT_EXPECT_EQ(test, rc, -EILSEQ);
+       KUNIT_EXPECT_EQ(test, strings[0], NULL);
 
        /* of_property_read_string_array() tests */
-       rc = of_property_read_string_array(np, "string-property", strings, 4);
-       unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
-       rc = of_property_read_string_array(np, "phandle-list-names", strings, 
4);
-       unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
-       rc = of_property_read_string_array(np, "unterminated-string", strings, 
4);
-       unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+       strings[1] = NULL;
+       KUNIT_EXPECT_EQ(test,
+                       of_property_read_string_array(np,
+                                                     "string-property",
+                                                     strings, 4),
+                       1);
+       KUNIT_EXPECT_EQ(test,
+                       of_property_read_string_array(np,
+                                                     "phandle-list-names",
+                                                     strings, 4),
+                       3);
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_property_read_string_array(np,
+                                                         "unterminated-string",
+                                                         strings, 4),
+                           -EILSEQ,
+                           "unterminated string");
        /* -- An incorrectly formed string should cause a failure */
-       rc = of_property_read_string_array(np, "unterminated-string-list", 
strings, 4);
-       unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
+       KUNIT_EXPECT_EQ_MSG(test,
+                           of_property_read_string_array(
+                                           np,
+                                           "unterminated-string-list",
+                                           strings,
+                                           4),
+                           -EILSEQ,
+                           "unterminated string array");
        /* -- parsing the correctly formed strings should still work: */
        strings[2] = NULL;
-       rc = of_property_read_string_array(np, "unterminated-string-list", 
strings, 2);
-       unittest(rc == 2 && strings[2] == NULL, 
"of_property_read_string_array() failure; rc=%i\n", rc);
+       rc = of_property_read_string_array(np,
+                                          "unterminated-string-list",
+                                          strings,
+                                          2);
+       KUNIT_EXPECT_EQ(test, rc, 2);
+       KUNIT_EXPECT_EQ(test, strings[2], NULL);
        strings[1] = NULL;
-       rc = of_property_read_string_array(np, "phandle-list-names", strings, 
1);
-       unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; 
rc=%i, str='%s'\n", rc, strings[1]);
+       rc = of_property_read_string_array(np,
+                                          "phandle-list-names",
+                                          strings,
+                                          1);
+       KUNIT_ASSERT_EQ(test, rc, 1);
+       KUNIT_EXPECT_EQ_MSG(test, strings[1], NULL,
+                           "Overwrote end of string array");
 }
 
 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
                        (p1)->value && (p2)->value && \
                        !memcmp((p1)->value, (p2)->value, (p1)->length) && \
                        !strcmp((p1)->name, (p2)->name))
-static void __init of_unittest_property_copy(void)
+static void of_unittest_property_copy(struct kunit *test)
 {
 #ifdef CONFIG_OF_DYNAMIC
        struct property p1 = { .name = "p1", .length = 0, .value = "" };
@@ -672,20 +790,24 @@ static void __init of_unittest_property_copy(void)
        struct property *new;
 
        new = __of_prop_dup(&p1, GFP_KERNEL);
-       unittest(new && propcmp(&p1, new), "empty property didn't copy 
correctly\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new);
+       KUNIT_EXPECT_TRUE_MSG(test, propcmp(&p1, new),
+                             "empty property didn't copy correctly");
        kfree(new->value);
        kfree(new->name);
        kfree(new);
 
        new = __of_prop_dup(&p2, GFP_KERNEL);
-       unittest(new && propcmp(&p2, new), "non-empty property didn't copy 
correctly\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new);
+       KUNIT_EXPECT_TRUE_MSG(test, propcmp(&p2, new),
+                             "non-empty property didn't copy correctly");
        kfree(new->value);
        kfree(new->name);
        kfree(new);
 #endif
 }
 
-static void __init of_unittest_changeset(void)
+static void of_unittest_changeset(struct kunit *test)
 {
 #ifdef CONFIG_OF_DYNAMIC
        struct property *ppadd, padd = { .name = "prop-add", .length = 1, 
.value = "" };
@@ -698,32 +820,32 @@ static void __init of_unittest_changeset(void)
        struct of_changeset chgset;
 
        n1 = __of_node_dup(NULL, "n1");
-       unittest(n1, "testcase setup failure\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, n1);
 
        n2 = __of_node_dup(NULL, "n2");
-       unittest(n2, "testcase setup failure\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, n2);
 
        n21 = __of_node_dup(NULL, "n21");
-       unittest(n21, "testcase setup failure %p\n", n21);
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, n21);
 
        nchangeset = of_find_node_by_path("/testcase-data/changeset");
        nremove = of_get_child_by_name(nchangeset, "node-remove");
-       unittest(nremove, "testcase setup failure\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, nremove);
 
        ppadd = __of_prop_dup(&padd, GFP_KERNEL);
-       unittest(ppadd, "testcase setup failure\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ppadd);
 
        ppname_n1  = __of_prop_dup(&pname_n1, GFP_KERNEL);
-       unittest(ppname_n1, "testcase setup failure\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ppname_n1);
 
        ppname_n2  = __of_prop_dup(&pname_n2, GFP_KERNEL);
-       unittest(ppname_n2, "testcase setup failure\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ppname_n2);
 
        ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
-       unittest(ppname_n21, "testcase setup failure\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ppname_n21);
 
        ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
-       unittest(ppupdate, "testcase setup failure\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ppupdate);
 
        parent = nchangeset;
        n1->parent = parent;
@@ -731,54 +853,82 @@ static void __init of_unittest_changeset(void)
        n21->parent = n2;
 
        ppremove = of_find_property(parent, "prop-remove", NULL);
-       unittest(ppremove, "failed to find removal prop");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ppremove);
 
        of_changeset_init(&chgset);
 
-       unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
-       unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add 
prop name\n");
-
-       unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
-       unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add 
prop name\n");
-
-       unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove 
node\n");
-       unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail 
add prop name\n");
-
-       unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
-
-       unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add 
prop prop-add\n");
-       unittest(!of_changeset_update_property(&chgset, parent, ppupdate), 
"fail update prop\n");
-       unittest(!of_changeset_remove_property(&chgset, parent, ppremove), 
"fail remove prop\n");
-
-       unittest(!of_changeset_apply(&chgset), "apply failed\n");
+       KUNIT_EXPECT_FALSE_MSG(test, of_changeset_attach_node(&chgset, n1),
+                              "fail attach n1\n");
+       KUNIT_EXPECT_FALSE_MSG(test,
+                              of_changeset_add_property(&chgset,
+                                                        n1,
+                                                        ppname_n1),
+                              "fail add prop name\n");
+
+       KUNIT_EXPECT_FALSE_MSG(test, of_changeset_attach_node(&chgset, n2),
+                              "fail attach n2\n");
+       KUNIT_EXPECT_FALSE_MSG(test,
+                              of_changeset_add_property(&chgset,
+                                                        n2,
+                                                        ppname_n2),
+                              "fail add prop name\n");
+
+       KUNIT_EXPECT_FALSE_MSG(test, of_changeset_detach_node(&chgset, nremove),
+                              "fail remove node\n");
+       KUNIT_EXPECT_FALSE_MSG(test,
+                              of_changeset_add_property(&chgset,
+                                                        n21,
+                                                        ppname_n21),
+                              "fail add prop name\n");
+
+       KUNIT_EXPECT_FALSE_MSG(test, of_changeset_attach_node(&chgset, n21),
+                              "fail attach n21\n");
+
+       KUNIT_EXPECT_FALSE_MSG(test,
+                              of_changeset_add_property(&chgset,
+                                                        parent,
+                                                        ppadd),
+                              "fail add prop prop-add\n");
+       KUNIT_EXPECT_FALSE_MSG(test,
+                              of_changeset_update_property(&chgset,
+                                                           parent,
+                                                           ppupdate),
+                              "fail update prop\n");
+       KUNIT_EXPECT_FALSE_MSG(test,
+                              of_changeset_remove_property(&chgset,
+                                                           parent,
+                                                           ppremove),
+                              "fail remove prop\n");
+
+       KUNIT_EXPECT_FALSE_MSG(test, of_changeset_apply(&chgset),
+                              "apply failed\n");
 
        of_node_put(nchangeset);
 
        /* Make sure node names are constructed correctly */
-       unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
-                "'%pOF' not added\n", n21);
+       KUNIT_EXPECT_NOT_ERR_OR_NULL_MSG(
+                       test,
+                       np = of_find_node_by_path(
+                                       "/testcase-data/changeset/n2/n21"),
+                       "'%pOF' not added\n", n21);
        of_node_put(np);
 
-       unittest(!of_changeset_revert(&chgset), "revert failed\n");
+       KUNIT_EXPECT_FALSE(test, of_changeset_revert(&chgset));
 
        of_changeset_destroy(&chgset);
 #endif
 }
 
-static void __init of_unittest_parse_interrupts(void)
+static void of_unittest_parse_interrupts(struct kunit *test)
 {
        struct device_node *np;
        struct of_phandle_args args;
        int i, rc;
 
-       if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
-               return;
+       KUNIT_ASSERT_FALSE(test, of_irq_workarounds & OF_IMAP_OLDWORLD_MAC);
 
        np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
-       if (!np) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
 
        for (i = 0; i < 4; i++) {
                bool passed = true;
@@ -790,16 +940,14 @@ static void __init of_unittest_parse_interrupts(void)
                passed &= (args.args_count == 1);
                passed &= (args.args[0] == (i + 1));
 
-               unittest(passed, "index %i - data error on node %pOF rc=%i\n",
-                        i, args.np, rc);
+               KUNIT_EXPECT_TRUE_MSG(test, passed,
+                                     "index %i - data error on node %pOF 
rc=%i\n",
+                                     i, args.np, rc);
        }
        of_node_put(np);
 
        np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
-       if (!np) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
 
        for (i = 0; i < 4; i++) {
                bool passed = true;
@@ -836,26 +984,23 @@ static void __init of_unittest_parse_interrupts(void)
                default:
                        passed = false;
                }
-               unittest(passed, "index %i - data error on node %pOF rc=%i\n",
-                        i, args.np, rc);
+               KUNIT_EXPECT_TRUE_MSG(test, passed,
+                                    "index %i - data error on node %pOF 
rc=%i\n",
+                                    i, args.np, rc);
        }
        of_node_put(np);
 }
 
-static void __init of_unittest_parse_interrupts_extended(void)
+static void of_unittest_parse_interrupts_extended(struct kunit *test)
 {
        struct device_node *np;
        struct of_phandle_args args;
        int i, rc;
 
-       if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
-               return;
+       KUNIT_ASSERT_FALSE(test, of_irq_workarounds & OF_IMAP_OLDWORLD_MAC);
 
        np = 
of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
-       if (!np) {
-               pr_err("missing testcase data\n");
-               return;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
 
        for (i = 0; i < 7; i++) {
                bool passed = true;
@@ -909,8 +1054,9 @@ static void __init 
of_unittest_parse_interrupts_extended(void)
                        passed = false;
                }
 
-               unittest(passed, "index %i - data error on node %pOF rc=%i\n",
-                        i, args.np, rc);
+               KUNIT_EXPECT_TRUE_MSG(test, passed,
+                                     "index %i - data error on node %pOF 
rc=%i\n",
+                                     i, args.np, rc);
        }
        of_node_put(np);
 }
@@ -950,7 +1096,7 @@ static struct {
        { .path = "/testcase-data/match-node/name9", .data = "K", },
 };
 
-static void __init of_unittest_match_node(void)
+static void of_unittest_match_node(struct kunit *test)
 {
        struct device_node *np;
        const struct of_device_id *match;
@@ -958,26 +1104,19 @@ static void __init of_unittest_match_node(void)
 
        for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
                np = of_find_node_by_path(match_node_tests[i].path);
-               if (!np) {
-                       unittest(0, "missing testcase node %s\n",
-                               match_node_tests[i].path);
-                       continue;
-               }
+               KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
 
                match = of_match_node(match_node_table, np);
-               if (!match) {
-                       unittest(0, "%s didn't match anything\n",
-                               match_node_tests[i].path);
-                       continue;
-               }
+               KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, np,
+                                                "%s didn't match anything",
+                                                match_node_tests[i].path);
 
-               if (strcmp(match->data, match_node_tests[i].data) != 0) {
-                       unittest(0, "%s got wrong match. expected %s, got %s\n",
-                               match_node_tests[i].path, 
match_node_tests[i].data,
-                               (const char *)match->data);
-                       continue;
-               }
-               unittest(1, "passed");
+               KUNIT_EXPECT_STREQ_MSG(test,
+                                      match->data, match_node_tests[i].data,
+                                      "%s got wrong match. expected %s, got 
%s\n",
+                                      match_node_tests[i].path,
+                                      match_node_tests[i].data,
+                                      (const char *)match->data);
        }
 }
 
@@ -989,9 +1128,9 @@ static struct resource test_bus_res = {
 static const struct platform_device_info test_bus_info = {
        .name = "unittest-bus",
 };
-static void __init of_unittest_platform_populate(void)
+static void of_unittest_platform_populate(struct kunit *test)
 {
-       int irq, rc;
+       int irq;
        struct device_node *np, *child, *grandchild;
        struct platform_device *pdev, *test_bus;
        const struct of_device_id match[] = {
@@ -1005,32 +1144,27 @@ static void __init of_unittest_platform_populate(void)
        /* Test that a missing irq domain returns -EPROBE_DEFER */
        np = of_find_node_by_path("/testcase-data/testcase-device1");
        pdev = of_find_device_by_node(np);
-       unittest(pdev, "device 1 creation failed\n");
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev);
 
        if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
                irq = platform_get_irq(pdev, 0);
-               unittest(irq == -EPROBE_DEFER,
-                        "device deferred probe failed - %d\n", irq);
+               KUNIT_ASSERT_EQ(test, irq, -EPROBE_DEFER);
 
                /* Test that a parsing failure does not return -EPROBE_DEFER */
                np = of_find_node_by_path("/testcase-data/testcase-device2");
                pdev = of_find_device_by_node(np);
-               unittest(pdev, "device 2 creation failed\n");
+               KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev);
                irq = platform_get_irq(pdev, 0);
-               unittest(irq < 0 && irq != -EPROBE_DEFER,
-                        "device parsing error failed - %d\n", irq);
+               KUNIT_ASSERT_TRUE_MSG(test, irq < 0 && irq != -EPROBE_DEFER,
+                                     "device parsing error failed - %d\n",
+                                     irq);
        }
 
        np = of_find_node_by_path("/testcase-data/platform-tests");
-       unittest(np, "No testcase data in device tree\n");
-       if (!np)
-               return;
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
 
        test_bus = platform_device_register_full(&test_bus_info);
-       rc = PTR_ERR_OR_ZERO(test_bus);
-       unittest(!rc, "testbus registration failed; rc=%i\n", rc);
-       if (rc)
-               return;
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, test_bus);
        test_bus->dev.of_node = np;
 
        /*
@@ -1045,17 +1179,21 @@ static void __init of_unittest_platform_populate(void)
        of_platform_populate(np, match, NULL, &test_bus->dev);
        for_each_child_of_node(np, child) {
                for_each_child_of_node(child, grandchild)
-                       unittest(of_find_device_by_node(grandchild),
-                                "Could not create device for node '%s'\n",
-                                grandchild->name);
+                       KUNIT_EXPECT_TRUE_MSG(test,
+                                             of_find_device_by_node(
+                                                             grandchild),
+                                             "Could not create device for node 
'%s'\n",
+                                             grandchild->name);
        }
 
        of_platform_depopulate(&test_bus->dev);
        for_each_child_of_node(np, child) {
                for_each_child_of_node(child, grandchild)
-                       unittest(!of_find_device_by_node(grandchild),
-                                "device didn't get destroyed '%s'\n",
-                                grandchild->name);
+                       KUNIT_EXPECT_FALSE_MSG(test,
+                                              of_find_device_by_node(
+                                                              grandchild),
+                                              "device didn't get destroyed 
'%s'\n",
+                                              grandchild->name);
        }
 
        platform_device_unregister(test_bus);
@@ -1129,7 +1267,7 @@ static int attach_node_and_children(struct device_node 
*np)
  *     unittest_data_add - Reads, copies data from
  *     linked tree and attaches it to the live tree
  */
-static int __init unittest_data_add(void)
+static int unittest_data_add(void)
 {
        void *unittest_data;
        struct device_node *unittest_data_node, *np;
@@ -1200,7 +1338,7 @@ static int __init unittest_data_add(void)
 }
 
 #ifdef CONFIG_OF_OVERLAY
-static int __init overlay_data_apply(const char *overlay_name, int 
*overlay_id);
+static int overlay_data_apply(const char *overlay_name, int *overlay_id);
 
 static int unittest_probe(struct platform_device *pdev)
 {
@@ -1429,173 +1567,157 @@ static void of_unittest_destroy_tracked_overlays(void)
        } while (defers > 0);
 }
 
-static int __init of_unittest_apply_overlay(int overlay_nr, int unittest_nr,
-               int *overlay_id)
+static int of_unittest_apply_overlay(struct kunit *test,
+                                    int overlay_nr,
+                                    int unittest_nr,
+                                    int *overlay_id)
 {
        const char *overlay_name;
 
        overlay_name = overlay_name_from_nr(overlay_nr);
 
-       if (!overlay_data_apply(overlay_name, overlay_id)) {
-               unittest(0, "could not apply overlay \"%s\"\n",
-                               overlay_name);
-               return -EFAULT;
-       }
+       KUNIT_ASSERT_TRUE_MSG(test,
+                             overlay_data_apply(overlay_name, overlay_id),
+                             "could not apply overlay \"%s\"\n",
+                             overlay_name);
        of_unittest_track_overlay(*overlay_id);
 
        return 0;
 }
 
 /* apply an overlay while checking before and after states */
-static int __init of_unittest_apply_overlay_check(int overlay_nr,
+static int of_unittest_apply_overlay_check(struct kunit *test, int overlay_nr,
                int unittest_nr, int before, int after,
                enum overlay_type ovtype)
 {
-       int ret, ovcs_id;
+       int ovcs_id;
 
        /* unittest device must not be in before state */
-       if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
-               unittest(0, "%s with device @\"%s\" %s\n",
-                               overlay_name_from_nr(overlay_nr),
-                               unittest_path(unittest_nr, ovtype),
-                               !before ? "enabled" : "disabled");
-               return -EINVAL;
-       }
+       KUNIT_ASSERT_EQ_MSG(test,
+                           of_unittest_device_exists(unittest_nr, ovtype),
+                           before,
+                           "%s with device @\"%s\" %s\n",
+                           overlay_name_from_nr(overlay_nr),
+                           unittest_path(unittest_nr, ovtype),
+                           !before ? "enabled" : "disabled");
 
        ovcs_id = 0;
-       ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ovcs_id);
-       if (ret != 0) {
-               /* of_unittest_apply_overlay already called unittest() */
-               return ret;
-       }
+       KUNIT_EXPECT_EQ(test,
+                       of_unittest_apply_overlay(test,
+                                                 overlay_nr,
+                                                 unittest_nr,
+                                                 &ovcs_id),
+                       0);
 
        /* unittest device must be to set to after state */
-       if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
-               unittest(0, "%s failed to create @\"%s\" %s\n",
-                               overlay_name_from_nr(overlay_nr),
-                               unittest_path(unittest_nr, ovtype),
-                               !after ? "enabled" : "disabled");
-               return -EINVAL;
-       }
+       KUNIT_ASSERT_EQ_MSG(test,
+                           of_unittest_device_exists(unittest_nr, ovtype),
+                           after,
+                           "%s failed to create @\"%s\" %s\n",
+                           overlay_name_from_nr(overlay_nr),
+                           unittest_path(unittest_nr, ovtype),
+                           !after ? "enabled" : "disabled");
 
        return 0;
 }
 
 /* apply an overlay and then revert it while checking before, after states */
-static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
+static int of_unittest_apply_revert_overlay_check(
+               struct kunit *test, int overlay_nr,
                int unittest_nr, int before, int after,
                enum overlay_type ovtype)
 {
-       int ret, ovcs_id;
+       int ovcs_id;
 
        /* unittest device must be in before state */
-       if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
-               unittest(0, "%s with device @\"%s\" %s\n",
-                               overlay_name_from_nr(overlay_nr),
-                               unittest_path(unittest_nr, ovtype),
-                               !before ? "enabled" : "disabled");
-               return -EINVAL;
-       }
+       KUNIT_ASSERT_EQ_MSG(test,
+                           of_unittest_device_exists(unittest_nr, ovtype),
+                           before,
+                           "%s with device @\"%s\" %s\n",
+                           overlay_name_from_nr(overlay_nr),
+                           unittest_path(unittest_nr, ovtype),
+                           !before ? "enabled" : "disabled");
 
        /* apply the overlay */
        ovcs_id = 0;
-       ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ovcs_id);
-       if (ret != 0) {
-               /* of_unittest_apply_overlay already called unittest() */
-               return ret;
-       }
+       KUNIT_ASSERT_EQ(test,
+                       of_unittest_apply_overlay(test,
+                                                 overlay_nr,
+                                                 unittest_nr,
+                                                 &ovcs_id),
+                       0);
 
        /* unittest device must be in after state */
-       if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
-               unittest(0, "%s failed to create @\"%s\" %s\n",
-                               overlay_name_from_nr(overlay_nr),
-                               unittest_path(unittest_nr, ovtype),
-                               !after ? "enabled" : "disabled");
-               return -EINVAL;
-       }
-
-       ret = of_overlay_remove(&ovcs_id);
-       if (ret != 0) {
-               unittest(0, "%s failed to be destroyed @\"%s\"\n",
-                               overlay_name_from_nr(overlay_nr),
-                               unittest_path(unittest_nr, ovtype));
-               return ret;
-       }
+       KUNIT_ASSERT_EQ_MSG(test,
+                           of_unittest_device_exists(unittest_nr, ovtype),
+                           after,
+                           "%s failed to create @\"%s\" %s\n",
+                           overlay_name_from_nr(overlay_nr),
+                           unittest_path(unittest_nr, ovtype),
+                           !after ? "enabled" : "disabled");
+
+       KUNIT_ASSERT_EQ_MSG(test, of_overlay_remove(&ovcs_id), 0,
+                           "%s failed to be destroyed @\"%s\"\n",
+                           overlay_name_from_nr(overlay_nr),
+                           unittest_path(unittest_nr, ovtype));
 
        /* unittest device must be again in before state */
-       if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
-               unittest(0, "%s with device @\"%s\" %s\n",
-                               overlay_name_from_nr(overlay_nr),
-                               unittest_path(unittest_nr, ovtype),
-                               !before ? "enabled" : "disabled");
-               return -EINVAL;
-       }
+       KUNIT_ASSERT_EQ_MSG(test,
+                           of_unittest_device_exists(unittest_nr,
+                                                     PDEV_OVERLAY),
+                           before,
+                           "%s with device @\"%s\" %s\n",
+                           overlay_name_from_nr(overlay_nr),
+                           unittest_path(unittest_nr, ovtype),
+                           !before ? "enabled" : "disabled");
 
        return 0;
 }
 
 /* test activation of device */
-static void __init of_unittest_overlay_0(void)
+static void of_unittest_overlay_0(struct kunit *test)
 {
        /* device should enable */
-       if (of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY))
-               return;
-
-       unittest(1, "overlay test %d passed\n", 0);
+       of_unittest_apply_overlay_check(test, 0, 0, 0, 1, PDEV_OVERLAY);
 }
 
 /* test deactivation of device */
-static void __init of_unittest_overlay_1(void)
+static void of_unittest_overlay_1(struct kunit *test)
 {
        /* device should disable */
-       if (of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY))
-               return;
-
-       unittest(1, "overlay test %d passed\n", 1);
+       of_unittest_apply_overlay_check(test, 1, 1, 1, 0, PDEV_OVERLAY);
 }
 
 /* test activation of device */
-static void __init of_unittest_overlay_2(void)
+static void of_unittest_overlay_2(struct kunit *test)
 {
        /* device should enable */
-       if (of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY))
-               return;
-
-       unittest(1, "overlay test %d passed\n", 2);
+       of_unittest_apply_overlay_check(test, 2, 2, 0, 1, PDEV_OVERLAY);
 }
 
 /* test deactivation of device */
-static void __init of_unittest_overlay_3(void)
+static void of_unittest_overlay_3(struct kunit *test)
 {
        /* device should disable */
-       if (of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY))
-               return;
-
-       unittest(1, "overlay test %d passed\n", 3);
+       of_unittest_apply_overlay_check(test, 3, 3, 1, 0, PDEV_OVERLAY);
 }
 
 /* test activation of a full device node */
-static void __init of_unittest_overlay_4(void)
+static void of_unittest_overlay_4(struct kunit *test)
 {
        /* device should disable */
-       if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
-               return;
-
-       unittest(1, "overlay test %d passed\n", 4);
+       of_unittest_apply_overlay_check(test, 4, 4, 0, 1, PDEV_OVERLAY);
 }
 
 /* test overlay apply/revert sequence */
-static void __init of_unittest_overlay_5(void)
+static void of_unittest_overlay_5(struct kunit *test)
 {
        /* device should disable */
-       if (of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY))
-               return;
-
-       unittest(1, "overlay test %d passed\n", 5);
+       of_unittest_apply_revert_overlay_check(test, 5, 5, 0, 1, PDEV_OVERLAY);
 }
 
 /* test overlay application in sequence */
-static void __init of_unittest_overlay_6(void)
+static void of_unittest_overlay_6(struct kunit *test)
 {
        int i, ov_id[2], ovcs_id;
        int overlay_nr = 6, unittest_nr = 6;
@@ -1604,74 +1726,69 @@ static void __init of_unittest_overlay_6(void)
 
        /* unittest device must be in before state */
        for (i = 0; i < 2; i++) {
-               if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
-                               != before) {
-                       unittest(0, "%s with device @\"%s\" %s\n",
-                                       overlay_name_from_nr(overlay_nr + i),
-                                       unittest_path(unittest_nr + i,
-                                               PDEV_OVERLAY),
-                                       !before ? "enabled" : "disabled");
-                       return;
-               }
+               KUNIT_ASSERT_EQ_MSG(test,
+                                   of_unittest_device_exists(unittest_nr + i,
+                                                             PDEV_OVERLAY),
+                                   before,
+                                   "%s with device @\"%s\" %s\n",
+                                   overlay_name_from_nr(overlay_nr + i),
+                                   unittest_path(unittest_nr + i,
+                                                 PDEV_OVERLAY),
+                                   !before ? "enabled" : "disabled");
        }
 
        /* apply the overlays */
        for (i = 0; i < 2; i++) {
-
                overlay_name = overlay_name_from_nr(overlay_nr + i);
 
-               if (!overlay_data_apply(overlay_name, &ovcs_id)) {
-                       unittest(0, "could not apply overlay \"%s\"\n",
-                                       overlay_name);
-                       return;
-               }
+               KUNIT_ASSERT_TRUE_MSG(test,
+                                     overlay_data_apply(overlay_name,
+                                                        &ovcs_id),
+                                     "could not apply overlay \"%s\"\n",
+                                     overlay_name);
                ov_id[i] = ovcs_id;
                of_unittest_track_overlay(ov_id[i]);
        }
 
        for (i = 0; i < 2; i++) {
                /* unittest device must be in after state */
-               if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
-                               != after) {
-                       unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
-                                       overlay_name_from_nr(overlay_nr + i),
-                                       unittest_path(unittest_nr + i,
-                                               PDEV_OVERLAY),
-                                       !after ? "enabled" : "disabled");
-                       return;
-               }
+               KUNIT_ASSERT_EQ_MSG(test,
+                                   of_unittest_device_exists(unittest_nr + i,
+                                                             PDEV_OVERLAY),
+                                   after,
+                                   "overlay @\"%s\" failed @\"%s\" %s\n",
+                                   overlay_name_from_nr(overlay_nr + i),
+                                   unittest_path(unittest_nr + i,
+                                                 PDEV_OVERLAY),
+                                   !after ? "enabled" : "disabled");
        }
 
        for (i = 1; i >= 0; i--) {
                ovcs_id = ov_id[i];
-               if (of_overlay_remove(&ovcs_id)) {
-                       unittest(0, "%s failed destroy @\"%s\"\n",
-                                       overlay_name_from_nr(overlay_nr + i),
-                                       unittest_path(unittest_nr + i,
-                                               PDEV_OVERLAY));
-                       return;
-               }
+               KUNIT_ASSERT_FALSE_MSG(test, of_overlay_remove(&ovcs_id),
+                                      "%s failed destroy @\"%s\"\n",
+                                      overlay_name_from_nr(overlay_nr + i),
+                                      unittest_path(unittest_nr + i,
+                                                    PDEV_OVERLAY));
                of_unittest_untrack_overlay(ov_id[i]);
        }
 
        for (i = 0; i < 2; i++) {
                /* unittest device must be again in before state */
-               if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
-                               != before) {
-                       unittest(0, "%s with device @\"%s\" %s\n",
-                                       overlay_name_from_nr(overlay_nr + i),
-                                       unittest_path(unittest_nr + i,
-                                               PDEV_OVERLAY),
-                                       !before ? "enabled" : "disabled");
-                       return;
-               }
+               KUNIT_ASSERT_EQ_MSG(test,
+                                   of_unittest_device_exists(unittest_nr + i,
+                                                             PDEV_OVERLAY),
+                                   before,
+                                   "%s with device @\"%s\" %s\n",
+                                   overlay_name_from_nr(overlay_nr + i),
+                                   unittest_path(unittest_nr + i,
+                                                 PDEV_OVERLAY),
+                                   !before ? "enabled" : "disabled");
        }
-
-       unittest(1, "overlay test %d passed\n", 6);
 }
 
 /* test overlay application in sequence */
-static void __init of_unittest_overlay_8(void)
+static void of_unittest_overlay_8(struct kunit *test)
 {
        int i, ov_id[2], ovcs_id;
        int overlay_nr = 8, unittest_nr = 8;
@@ -1681,76 +1798,73 @@ static void __init of_unittest_overlay_8(void)
 
        /* apply the overlays */
        for (i = 0; i < 2; i++) {
-
                overlay_name = overlay_name_from_nr(overlay_nr + i);
 
-               if (!overlay_data_apply(overlay_name, &ovcs_id)) {
-                       unittest(0, "could not apply overlay \"%s\"\n",
-                                       overlay_name);
-                       return;
-               }
+               KUNIT_ASSERT_TRUE_MSG(test,
+                                     overlay_data_apply(overlay_name,
+                                                        &ovcs_id),
+                                     "could not apply overlay \"%s\"\n",
+                                     overlay_name);
                ov_id[i] = ovcs_id;
                of_unittest_track_overlay(ov_id[i]);
        }
 
        /* now try to remove first overlay (it should fail) */
        ovcs_id = ov_id[0];
-       if (!of_overlay_remove(&ovcs_id)) {
-               unittest(0, "%s was destroyed @\"%s\"\n",
-                               overlay_name_from_nr(overlay_nr + 0),
-                               unittest_path(unittest_nr,
-                                       PDEV_OVERLAY));
-               return;
-       }
+       KUNIT_ASSERT_TRUE_MSG(test, of_overlay_remove(&ovcs_id),
+                             "%s was destroyed @\"%s\"\n",
+                             overlay_name_from_nr(overlay_nr + 0),
+                             unittest_path(unittest_nr,
+                                           PDEV_OVERLAY));
 
        /* removing them in order should work */
        for (i = 1; i >= 0; i--) {
                ovcs_id = ov_id[i];
-               if (of_overlay_remove(&ovcs_id)) {
-                       unittest(0, "%s not destroyed @\"%s\"\n",
-                                       overlay_name_from_nr(overlay_nr + i),
-                                       unittest_path(unittest_nr,
-                                               PDEV_OVERLAY));
-                       return;
-               }
+               KUNIT_ASSERT_FALSE_MSG(test, of_overlay_remove(&ovcs_id),
+                                      "%s not destroyed @\"%s\"\n",
+                                      overlay_name_from_nr(overlay_nr + i),
+                                      unittest_path(unittest_nr,
+                                                    PDEV_OVERLAY));
                of_unittest_untrack_overlay(ov_id[i]);
        }
-
-       unittest(1, "overlay test %d passed\n", 8);
 }
 
 /* test insertion of a bus with parent devices */
-static void __init of_unittest_overlay_10(void)
+static void of_unittest_overlay_10(struct kunit *test)
 {
-       int ret;
        char *child_path;
 
        /* device should disable */
-       ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
-       if (unittest(ret == 0,
-                       "overlay test %d failed; overlay application\n", 10))
-               return;
+       KUNIT_ASSERT_EQ_MSG(test,
+                           of_unittest_apply_overlay_check(test,
+                                                           10,
+                                                           10,
+                                                           0,
+                                                           1,
+                                                           PDEV_OVERLAY),
+                           0,
+                           "overlay test %d failed; overlay application\n",
+                           10);
 
        child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
                        unittest_path(10, PDEV_OVERLAY));
-       if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
-               return;
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, child_path);
 
-       ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
+       KUNIT_EXPECT_TRUE_MSG(test,
+                             of_path_device_type_exists(child_path,
+                                                        PDEV_OVERLAY),
+                             "overlay test %d failed; no child device\n", 10);
        kfree(child_path);
-
-       unittest(ret, "overlay test %d failed; no child device\n", 10);
 }
 
 /* test insertion of a bus with parent devices (and revert) */
-static void __init of_unittest_overlay_11(void)
+static void of_unittest_overlay_11(struct kunit *test)
 {
-       int ret;
-
        /* device should disable */
-       ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
-                       PDEV_OVERLAY);
-       unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
+       KUNIT_EXPECT_FALSE(test,
+                         of_unittest_apply_revert_overlay_check(test,
+                                                                11, 11, 0, 1,
+                                                                PDEV_OVERLAY));
 }
 
 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
@@ -1972,25 +2086,23 @@ static struct i2c_driver unittest_i2c_mux_driver = {
 
 #endif
 
-static int of_unittest_overlay_i2c_init(void)
+static int of_unittest_overlay_i2c_init(struct kunit *test)
 {
-       int ret;
+       KUNIT_ASSERT_EQ_MSG(test,
+                           i2c_add_driver(&unittest_i2c_dev_driver),
+                           0,
+                           "could not register unittest i2c device driver\n");
 
-       ret = i2c_add_driver(&unittest_i2c_dev_driver);
-       if (unittest(ret == 0,
-                       "could not register unittest i2c device driver\n"))
-               return ret;
-
-       ret = platform_driver_register(&unittest_i2c_bus_driver);
-       if (unittest(ret == 0,
-                       "could not register unittest i2c bus driver\n"))
-               return ret;
+       KUNIT_ASSERT_EQ_MSG(test,
+                           platform_driver_register(&unittest_i2c_bus_driver),
+                           0,
+                           "could not register unittest i2c bus driver\n");
 
 #if IS_BUILTIN(CONFIG_I2C_MUX)
-       ret = i2c_add_driver(&unittest_i2c_mux_driver);
-       if (unittest(ret == 0,
-                       "could not register unittest i2c mux driver\n"))
-               return ret;
+       KUNIT_ASSERT_EQ_MSG(test,
+                           i2c_add_driver(&unittest_i2c_mux_driver),
+                           0,
+                           "could not register unittest i2c mux driver\n");
 #endif
 
        return 0;
@@ -2005,101 +2117,89 @@ static void of_unittest_overlay_i2c_cleanup(void)
        i2c_del_driver(&unittest_i2c_dev_driver);
 }
 
-static void __init of_unittest_overlay_i2c_12(void)
+static void of_unittest_overlay_i2c_12(struct kunit *test)
 {
        /* device should enable */
-       if (of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY))
-               return;
-
-       unittest(1, "overlay test %d passed\n", 12);
+       of_unittest_apply_overlay_check(test, 12, 12, 0, 1, I2C_OVERLAY);
 }
 
 /* test deactivation of device */
-static void __init of_unittest_overlay_i2c_13(void)
+static void of_unittest_overlay_i2c_13(struct kunit *test)
 {
        /* device should disable */
-       if (of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY))
-               return;
-
-       unittest(1, "overlay test %d passed\n", 13);
+       of_unittest_apply_overlay_check(test, 13, 13, 1, 0, I2C_OVERLAY);
 }
 
 /* just check for i2c mux existence */
-static void of_unittest_overlay_i2c_14(void)
+static void of_unittest_overlay_i2c_14(struct kunit *test)
 {
+       KUNIT_SUCCEED(test);
 }
 
-static void __init of_unittest_overlay_i2c_15(void)
+static void of_unittest_overlay_i2c_15(struct kunit *test)
 {
        /* device should enable */
-       if (of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY))
-               return;
-
-       unittest(1, "overlay test %d passed\n", 15);
+       of_unittest_apply_overlay_check(test, 15, 15, 0, 1, I2C_OVERLAY);
 }
 
 #else
 
-static inline void of_unittest_overlay_i2c_14(void) { }
-static inline void of_unittest_overlay_i2c_15(void) { }
+static inline void of_unittest_overlay_i2c_14(struct kunit *test) { }
+static inline void of_unittest_overlay_i2c_15(struct kunit *test) { }
 
 #endif
 
-static void __init of_unittest_overlay(void)
+static void of_unittest_overlay(struct kunit *test)
 {
        struct device_node *bus_np = NULL;
 
-       if (platform_driver_register(&unittest_driver)) {
-               unittest(0, "could not register unittest driver\n");
-               goto out;
-       }
+       KUNIT_ASSERT_FALSE_MSG(test,
+                              platform_driver_register(&unittest_driver),
+                              "could not register unittest driver\n");
 
        bus_np = of_find_node_by_path(bus_path);
-       if (bus_np == NULL) {
-               unittest(0, "could not find bus_path \"%s\"\n", bus_path);
-               goto out;
-       }
+       KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, bus_np,
+                                        "could not find bus_path \"%s\"\n",
+                                        bus_path);
 
-       if (of_platform_default_populate(bus_np, NULL, NULL)) {
-               unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
-               goto out;
-       }
+       KUNIT_ASSERT_FALSE_MSG(test,
+                              of_platform_default_populate(bus_np, NULL, NULL),
+                              "could not populate bus @ \"%s\"\n", bus_path);
 
-       if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
-               unittest(0, "could not find unittest0 @ \"%s\"\n",
-                               unittest_path(100, PDEV_OVERLAY));
-               goto out;
-       }
+       KUNIT_ASSERT_TRUE_MSG(test,
+                             of_unittest_device_exists(100, PDEV_OVERLAY),
+                             "could not find unittest0 @ \"%s\"\n",
+                             unittest_path(100, PDEV_OVERLAY));
 
-       if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
-               unittest(0, "unittest1 @ \"%s\" should not exist\n",
-                               unittest_path(101, PDEV_OVERLAY));
-               goto out;
-       }
-
-       unittest(1, "basic infrastructure of overlays passed");
+       KUNIT_ASSERT_FALSE_MSG(test,
+                              of_unittest_device_exists(101, PDEV_OVERLAY),
+                              "unittest1 @ \"%s\" should not exist\n",
+                              unittest_path(101, PDEV_OVERLAY));
 
        /* tests in sequence */
-       of_unittest_overlay_0();
-       of_unittest_overlay_1();
-       of_unittest_overlay_2();
-       of_unittest_overlay_3();
-       of_unittest_overlay_4();
-       of_unittest_overlay_5();
-       of_unittest_overlay_6();
-       of_unittest_overlay_8();
-
-       of_unittest_overlay_10();
-       of_unittest_overlay_11();
+       of_unittest_overlay_0(test);
+       of_unittest_overlay_1(test);
+       of_unittest_overlay_2(test);
+       of_unittest_overlay_3(test);
+       of_unittest_overlay_4(test);
+       of_unittest_overlay_5(test);
+       of_unittest_overlay_6(test);
+       of_unittest_overlay_8(test);
+
+       of_unittest_overlay_10(test);
+       of_unittest_overlay_11(test);
 
 #if IS_BUILTIN(CONFIG_I2C)
-       if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
+       KUNIT_ASSERT_EQ_MSG(test,
+                          of_unittest_overlay_i2c_init(test),
+                          0,
+                          "i2c init failed\n");
                goto out;
 
-       of_unittest_overlay_i2c_12();
-       of_unittest_overlay_i2c_13();
-       of_unittest_overlay_i2c_14();
-       of_unittest_overlay_i2c_15();
+       of_unittest_overlay_i2c_12(test);
+       of_unittest_overlay_i2c_13(test);
+       of_unittest_overlay_i2c_14(test);
+       of_unittest_overlay_i2c_15(test);
 
        of_unittest_overlay_i2c_cleanup();
 #endif
@@ -2111,7 +2211,7 @@ static void __init of_unittest_overlay(void)
 }
 
 #else
-static inline void __init of_unittest_overlay(void) { }
+static inline void of_unittest_overlay(struct kunit *test) { }
 #endif
 
 #ifdef CONFIG_OF_OVERLAY
@@ -2254,7 +2354,7 @@ void __init unittest_unflatten_overlay_base(void)
  *
  * Return 0 on unexpected error.
  */
-static int __init overlay_data_apply(const char *overlay_name, int *overlay_id)
+static int overlay_data_apply(const char *overlay_name, int *overlay_id)
 {
        struct overlay_info *info;
        int found = 0;
@@ -2301,19 +2401,17 @@ static int __init overlay_data_apply(const char 
*overlay_name, int *overlay_id)
  * The first part of the function is _not_ normal overlay usage; it is
  * finishing splicing the base overlay device tree into the live tree.
  */
-static __init void of_unittest_overlay_high_level(void)
+static void of_unittest_overlay_high_level(struct kunit *test)
 {
        struct device_node *last_sibling;
        struct device_node *np;
        struct device_node *of_symbols;
-       struct device_node *overlay_base_symbols;
+       struct device_node *overlay_base_symbols = 0;
        struct device_node **pprev;
        struct property *prop;
 
-       if (!overlay_base_root) {
-               unittest(0, "overlay_base_root not initialized\n");
-               return;
-       }
+       KUNIT_ASSERT_TRUE_MSG(test, overlay_base_root,
+                             "overlay_base_root not initialized\n");
 
        /*
         * Could not fixup phandles in unittest_unflatten_overlay_base()
@@ -2358,11 +2456,10 @@ static __init void of_unittest_overlay_high_level(void)
        }
 
        for (np = overlay_base_root->child; np; np = np->sibling) {
-               if (of_get_child_by_name(of_root, np->name)) {
-                       unittest(0, "illegal node name in overlay_base %s",
-                               np->name);
-                       return;
-               }
+               KUNIT_ASSERT_FALSE_MSG(test,
+                                     of_get_child_by_name(of_root, np->name),
+                                     "illegal node name in overlay_base %s",
+                                     np->name);
        }
 
        /*
@@ -2395,21 +2492,24 @@ static __init void of_unittest_overlay_high_level(void)
 
                        new_prop = __of_prop_dup(prop, GFP_KERNEL);
                        if (!new_prop) {
-                               unittest(0, "__of_prop_dup() of '%s' from 
overlay_base node __symbols__",
-                                        prop->name);
+                               KUNIT_FAIL(test,
+                                          "__of_prop_dup() of '%s' from 
overlay_base node __symbols__",
+                                          prop->name);
                                goto err_unlock;
                        }
                        if (__of_add_property(of_symbols, new_prop)) {
                                /* "name" auto-generated by unflatten */
                                if (!strcmp(new_prop->name, "name"))
                                        continue;
-                               unittest(0, "duplicate property '%s' in 
overlay_base node __symbols__",
-                                        prop->name);
+                               KUNIT_FAIL(test,
+                                          "duplicate property '%s' in 
overlay_base node __symbols__",
+                                          prop->name);
                                goto err_unlock;
                        }
                        if (__of_add_property_sysfs(of_symbols, new_prop)) {
-                               unittest(0, "unable to add property '%s' in 
overlay_base node __symbols__ to sysfs",
-                                        prop->name);
+                               KUNIT_FAIL(test,
+                                          "unable to add property '%s' in 
overlay_base node __symbols__ to sysfs",
+                                          prop->name);
                                goto err_unlock;
                        }
                }
@@ -2420,14 +2520,16 @@ static __init void of_unittest_overlay_high_level(void)
 
        /* now do the normal overlay usage test */
 
-       unittest(overlay_data_apply("overlay", NULL),
-                "Adding overlay 'overlay' failed\n");
+       KUNIT_EXPECT_TRUE_MSG(test, overlay_data_apply("overlay", NULL),
+                             "Adding overlay 'overlay' failed\n");
 
-       unittest(overlay_data_apply("overlay_bad_phandle", NULL),
-                "Adding overlay 'overlay_bad_phandle' failed\n");
+       KUNIT_EXPECT_TRUE_MSG(test,
+                             overlay_data_apply("overlay_bad_phandle", NULL),
+                             "Adding overlay 'overlay_bad_phandle' failed\n");
 
-       unittest(overlay_data_apply("overlay_bad_symbol", NULL),
-                "Adding overlay 'overlay_bad_symbol' failed\n");
+       KUNIT_EXPECT_TRUE_MSG(test,
+                             overlay_data_apply("overlay_bad_symbol", NULL),
+                             "Adding overlay 'overlay_bad_symbol' failed\n");
 
        return;
 
@@ -2437,54 +2539,49 @@ static __init void of_unittest_overlay_high_level(void)
 
 #else
 
-static inline __init void of_unittest_overlay_high_level(void) {}
+static inline void of_unittest_overlay_high_level(struct kunit *test) {}
 
 #endif
 
-static int __init of_unittest(void)
+static int of_test_init(struct kunit *test)
 {
-       struct device_node *np;
-       int res;
-
        /* adding data for unittest */
-       res = unittest_data_add();
-       if (res)
-               return res;
+       KUNIT_ASSERT_EQ(test, 0, unittest_data_add());
+
        if (!of_aliases)
                of_aliases = of_find_node_by_path("/aliases");
 
-       np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-       if (!np) {
-               pr_info("No testcase data in device tree; not running tests\n");
-               return 0;
-       }
-       of_node_put(np);
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, of_find_node_by_path(
+                       "/testcase-data/phandle-tests/consumer-a"));
 
-       pr_info("start of unittest - you will see error messages\n");
-       of_unittest_check_tree_linkage();
-       of_unittest_check_phandles();
-       of_unittest_find_node_by_name();
-       of_unittest_dynamic();
-       of_unittest_parse_phandle_with_args();
-       of_unittest_parse_phandle_with_args_map();
-       of_unittest_printf();
-       of_unittest_property_string();
-       of_unittest_property_copy();
-       of_unittest_changeset();
-       of_unittest_parse_interrupts();
-       of_unittest_parse_interrupts_extended();
-       of_unittest_match_node();
-       of_unittest_platform_populate();
-       of_unittest_overlay();
+       return 0;
+}
 
+static struct kunit_case of_test_cases[] = {
+       KUNIT_CASE(of_unittest_check_tree_linkage),
+       KUNIT_CASE(of_unittest_check_phandles),
+       KUNIT_CASE(of_unittest_find_node_by_name),
+       KUNIT_CASE(of_unittest_dynamic),
+       KUNIT_CASE(of_unittest_parse_phandle_with_args),
+       KUNIT_CASE(of_unittest_parse_phandle_with_args_map),
+       KUNIT_CASE(of_unittest_printf),
+       KUNIT_CASE(of_unittest_property_string),
+       KUNIT_CASE(of_unittest_property_copy),
+       KUNIT_CASE(of_unittest_changeset),
+       KUNIT_CASE(of_unittest_parse_interrupts),
+       KUNIT_CASE(of_unittest_parse_interrupts_extended),
+       KUNIT_CASE(of_unittest_match_node),
+       KUNIT_CASE(of_unittest_platform_populate),
+       KUNIT_CASE(of_unittest_overlay),
        /* Double check linkage after removing testcase data */
-       of_unittest_check_tree_linkage();
-
-       of_unittest_overlay_high_level();
-
-       pr_info("end of unittest - %i passed, %i failed\n",
-               unittest_results.passed, unittest_results.failed);
+       KUNIT_CASE(of_unittest_check_tree_linkage),
+       KUNIT_CASE(of_unittest_overlay_high_level),
+       {},
+};
 
-       return 0;
-}
-late_initcall(of_unittest);
+static struct kunit_module of_test_module = {
+       .name = "of-test",
+       .init = of_test_init,
+       .test_cases = of_test_cases,
+};
+module_test(of_test_module);
-- 
2.20.0.rc0.387.gc7a69e6b6c-goog

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