tree dfecc3aa2acae305c01238002a3e53d6ae8d3238
parent f3c737de8f57b5ce756010c2175f7d574194b30d
author Hannes Reinecke <hare@suse.de> 1240475579 +0200
committer Jens Axboe <jens.axboe@oracle.com> 1240556061 +0200

block: fix intermittent dm timeout based oops

Very rarely under stress testing of dm, oopses are occuring as
something tampers with an old stack frame.  This has been traced back
to blk_abort_queue() leaving a timeout_list pointing to the stack.
The reason is that sometimes blk_abort_request() won't delete the
timer (if the request is marked as complete but before the timer has
been removed, a small race window).  Fix this by splicing back from
the ususally empty list to the q->timeout_list.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>