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>
This commit is contained in:
Dan Williams 2009-06-16 16:00:33 -07:00 committed by NeilBrown
parent 495d357301
commit 7a3ab90894
1 changed files with 1 additions and 0 deletions

View File

@ -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;
}
}