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of_partition: devfs_add_partition returns an error pointer 

Check for the return value of devfs_add_partition with IS_ERR.
Otherwise we dereference a NULL pointer when devfs_add_partition
fails.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2014-07-31 15:05:37 +02:00
parent 2fd4f0fbe9
commit 79fa5783b8
1 changed files with 4 additions and 0 deletions
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4
drivers/of/partition.c
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@ -21,6 +21,7 @@
#include <of.h>
#include <malloc.h>
#include <linux/mtd/mtd.h>
#include <linux/err.h>
#include <nand.h>
struct cdev *of_parse_partition(struct cdev *cdev, struct device_node *node)
@ -60,6 +61,9 @@ struct cdev *of_parse_partition(struct cdev *cdev, struct device_node *node)
filename = asprintf("%s.%s", cdev->name, partname);
new = devfs_add_partition(cdev->name, offset, size, flags, filename);
if (IS_ERR(new))
new = NULL;
if (new && new->dev)
new->dev->device_node = node;