From: NeilBrown <neilb@suse.de>
Date: Mon, 17 May 2010 01:27:00 +0000 (+1000)
Subject: md/linear: avoid possible oops and array stop
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ef2f80ff7325b2c1888ff02ead28957b5840bf51;p=openwrt%2Fstaging%2Fblogic.git

md/linear: avoid possible oops and array stop

Since commit ef286f6fa673cd7fb367e1b145069d8dbfcc6081
it has been important that each personality clears
->private in the ->stop() function, or sets it to a
attribute group to be removed.
linear.c doesn't.  This can sometimes lead to an oops,
though it doesn't always.

Suitable for 2.6.33-stable and 2.6.34.

Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
---

diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index bb2a23159b21..9db8ee0614a4 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -281,6 +281,7 @@ static int linear_stop (mddev_t *mddev)
 	rcu_barrier();
 	blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/
 	kfree(conf);
+	mddev->private = NULL;
 
 	return 0;
 }