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md/raid5: use sysfs_notify_dirent_safe to avoid NULL pointer

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With the module parameter 'start_dirty_degraded' set,
raid5_spare_active() previously called sysfs_notify_dirent() with a NULL
argument (rdev->sysfs_state) when a rebuild finished.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Jonathan Brassow 2011-01-14 09:14:33 +11:00 committed by NeilBrown
parent 0ca69886a8
commit 43c73ca43b
1 changed files with 1 additions and 1 deletions
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2
drivers/md/raid5.c
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@ -5338,7 +5338,7 @@ static int raid5_spare_active(mddev_t *mddev)
&& !test_bit(Faulty, &tmp->rdev->flags)
&& !test_and_set_bit(In_sync, &tmp->rdev->flags)) {
count++;
sysfs_notify_dirent(tmp->rdev->sysfs_state);
sysfs_notify_dirent_safe(tmp->rdev->sysfs_state);
}
}
spin_lock_irqsave(&conf->device_lock, flags);