2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Dan Williams <dan.j.williams@intel.com>

commit 7a3ab908948b6296ee7e81d42f7c176361c51975 upstream.

In the unlikely event that reshape progresses past the current request
while it is waiting for a stripe we need to schedule() before retrying
for 2 reasons:
1/ Prevent list corruption from duplicated list_add() calls without
   intervening list_del().
2/ Give the reshape code a chance to make some progress to resolve the
   conflict.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/md/raid5.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3431,6 +3431,7 @@ static int make_request(struct request_q
 				spin_unlock_irq(&conf->device_lock);
 				if (must_retry) {
 					release_stripe(sh);
+					schedule();
 					goto retry;
 				}
 			}


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