[dm-devel] [PATCH v3 3/8] md/raid5: use sysfs_notify_dirent_safe to avoid NULL pointer

[Mike Snitzer]

From: Jonathan Brassow <jbrassow at redhat.com>

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 at redhat.com>
Signed-off-by: Mike Snitzer <snitzer at redhat.com>
---
 drivers/md/raid5.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index dc574f3..3219fd9 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5339,7 +5339,7 @@ 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);
-- 
1.7.2.3