[PATCH 1/5] dma-buf: cleanup dma_fence_unwrap selftest v2

[Christian König]

The selftests, fix the error handling, remove unused functions and stop
leaking memory in failed tests.

v2: fix the memory leak correctly.

Signed-off-by: Christian König <christian.koe...@amd.com>
---
 drivers/dma-buf/st-dma-fence-unwrap.c | 48 +++++++++++----------------
 1 file changed, 19 insertions(+), 29 deletions(-)

diff --git a/drivers/dma-buf/st-dma-fence-unwrap.c 
b/drivers/dma-buf/st-dma-fence-unwrap.c
index 039f016b57be..e20c5a7dcfe4 100644
--- a/drivers/dma-buf/st-dma-fence-unwrap.c
+++ b/drivers/dma-buf/st-dma-fence-unwrap.c
@@ -4,27 +4,19 @@
  * Copyright (C) 2022 Advanced Micro Devices, Inc.
  */
 
+#include <linux/dma-fence.h>
+#include <linux/dma-fence-array.h>
+#include <linux/dma-fence-chain.h>
 #include <linux/dma-fence-unwrap.h>
-#if 0
-#include <linux/kernel.h>
-#include <linux/kthread.h>
-#include <linux/mm.h>
-#include <linux/sched/signal.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/random.h>
-#endif
 
 #include "selftest.h"
 
 #define CHAIN_SZ (4 << 10)
 
-static inline struct mock_fence {
+struct mock_fence {
        struct dma_fence base;
        spinlock_t lock;
-} *to_mock_fence(struct dma_fence *f) {
-       return container_of(f, struct mock_fence, base);
-}
+};
 
 static const char *mock_name(struct dma_fence *f)
 {
@@ -45,7 +37,8 @@ static struct dma_fence *mock_fence(void)
                return NULL;
 
        spin_lock_init(&f->lock);
-       dma_fence_init(&f->base, &mock_ops, &f->lock, 0, 0);
+       dma_fence_init(&f->base, &mock_ops, &f->lock,
+                      dma_fence_context_alloc(1), 1);
 
        return &f->base;
 }
@@ -59,7 +52,7 @@ static struct dma_fence *mock_array(unsigned int num_fences, 
...)
 
        fences = kcalloc(num_fences, sizeof(*fences), GFP_KERNEL);
        if (!fences)
-               return NULL;
+               goto error_put;
 
        va_start(valist, num_fences);
        for (i = 0; i < num_fences; ++i)
@@ -70,13 +63,17 @@ static struct dma_fence *mock_array(unsigned int 
num_fences, ...)
                                       dma_fence_context_alloc(1),
                                       1, false);
        if (!array)
-               goto cleanup;
+               goto error_free;
        return &array->base;
 
-cleanup:
-       for (i = 0; i < num_fences; ++i)
-               dma_fence_put(fences[i]);
+error_free:
        kfree(fences);
+
+error_put:
+       va_start(valist, num_fences);
+       for (i = 0; i < num_fences; ++i)
+               dma_fence_put(va_arg(valist, typeof(*fences)));
+       va_end(valist);
        return NULL;
 }
 
@@ -113,7 +110,6 @@ static int sanitycheck(void *arg)
        if (!chain)
                return -ENOMEM;
 
-       dma_fence_signal(f);
        dma_fence_put(chain);
        return err;
 }
@@ -154,10 +150,8 @@ static int unwrap_array(void *arg)
                err = -EINVAL;
        }
 
-       dma_fence_signal(f1);
-       dma_fence_signal(f2);
        dma_fence_put(array);
-       return 0;
+       return err;
 }
 
 static int unwrap_chain(void *arg)
@@ -196,10 +190,8 @@ static int unwrap_chain(void *arg)
                err = -EINVAL;
        }
 
-       dma_fence_signal(f1);
-       dma_fence_signal(f2);
        dma_fence_put(chain);
-       return 0;
+       return err;
 }
 
 static int unwrap_chain_array(void *arg)
@@ -242,10 +234,8 @@ static int unwrap_chain_array(void *arg)
                err = -EINVAL;
        }
 
-       dma_fence_signal(f1);
-       dma_fence_signal(f2);
        dma_fence_put(chain);
-       return 0;
+       return err;
 }
 
 int dma_fence_unwrap(void)
-- 
2.25.1