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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 2007-06-14 03:45:13 +09:00 committed by Greg Kroah-Hartman
parent 2b611bb7ab
commit 7a23ad4404
1 changed files with 1 additions and 1 deletions
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2
fs/sysfs/sysfs.h
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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);
}