Commit 7a3ab908 authored Jun 16, 2009 by Dan Williams Committed by NeilBrown Jun 18, 2009

md/raid5: add missing call to schedule() after prepare_to_wait()



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.

Cc: <stable@kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

parent 495d3573

drivers/md/raid5.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -3695,6 +3695,7 @@ static int make_request(struct request_queue q, struct bio bi)
		spin_unlock_irq(&conf->device_lock);
		if (must_retry) {
		release_stripe(sh);
		schedule();
		goto retry;
		}
		}