From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jonathan Brassow <jbrassow@redhat.com>
Subject: [PATCH] MD: raid1 s/sysfs_notify_dirent/sysfs_notify_dirent_safe
Date: Thu, 14 Jul 2011 15:53:49 -0500
Message-ID: <1310676829.2246.7.camel@f14.redhat.com>
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Return-path: <linux-raid-owner@vger.kernel.org>
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To: linux-raid@vger.kernel.org
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If device-mapper creates a RAID1 array that includes devices to
be rebuilt, it will deref a NULL pointer when finished because
sysfs is not used by device-mapper instantiated RAID devices.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>

Index: linux-2.6/drivers/md/raid1.c
===================================================================
--- linux-2.6.orig/drivers/md/raid1.c
+++ linux-2.6/drivers/md/raid1.c
@@ -1027,7 +1027,7 @@ static int raid1_spare_active(mddev_t *m
 		    && !test_bit(Faulty, &rdev->flags)
 		    && !test_and_set_bit(In_sync, &rdev->flags)) {
 			count++;
-			sysfs_notify_dirent(rdev->sysfs_state);
+			sysfs_notify_dirent_safe(rdev->sysfs_state);
 		}
 	}
 	spin_lock_irqsave(&conf->device_lock, flags);