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sysfs: make sysfs_put() ignore NULL sd

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Make sysfs_put() ignore NULL sd instead of oopsing.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tejun Heo
2007-07-11 16:09:03 -07:00
committed by Greg Kroah-Hartman
parent 2b611bb7ab
commit 7a23ad4404
1 changed files with 1 additions and 1 deletions
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fs/sysfs/sysfs.h
+1 -1
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@@ -111,7 +111,7 @@ static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
static inline void sysfs_put(struct sysfs_dirent * sd)
{
if (atomic_dec_and_test(&sd->s_count))
if (sd && atomic_dec_and_test(&sd->s_count))
release_sysfs_dirent(sd);
}