[PATCH] fixup! of: add function to read a file as unflattened device tree

[Ahmad Fatoum]

of: tidy up of_read_file a bit

 - change a single instance of space indentation to tabs
 - use %m instead of unwieldy strerror(errno)
 - add documentation

Signed-off-by: Ahmad Fatoum <a.fat...@pengutronix.de>
---
 drivers/of/base.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 918d5e0c5348..5da188115547 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2893,6 +2893,12 @@ int of_device_disable_by_alias(const char *alias)
        return of_device_disable(node);
 }
 
+/**
+ * of_read_file - unflatten oftree file
+ * @filename - path to file to unflatten its contents
+ *
+ * Returns the root node of the tree or an error pointer on error.
+ */
 struct device_node *of_read_file(const char *filename)
 {
        void *fdt;
@@ -2901,8 +2907,7 @@ struct device_node *of_read_file(const char *filename)
 
        fdt = read_file(filename, &size);
        if (!fdt) {
-               pr_err("unable to read %s: %s\n", filename,
-                       strerror(errno));
+               pr_err("unable to read %s: %m\n", filename);
                return ERR_PTR(-errno);
        }
 
@@ -2916,7 +2921,7 @@ struct device_node *of_read_file(const char *filename)
 out:
        free(fdt);
 
-       return root;
+       return root;
 }
 
 /**
-- 
2.39.2