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blk-mq: Allow requests to never expire

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Some types of requests may be started that are not gauranteed to ever
complete. This adds a request flag that a driver can use so mark the
request as such.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch
2015-01-07 18:55:46 -07:00
committed by Jens Axboe
parent 1885b24d23
commit 5b3f25fc34
3 changed files with 8 additions and 1 deletions
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3
block/blk-timeout.c
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@@ -190,6 +190,9 @@ void blk_add_timer(struct request *req)
struct request_queue *q = req->q;
unsigned long expiry;
if (req->cmd_flags & REQ_NO_TIMEOUT)
return;
/* blk-mq has its own handler, so we don't need ->rq_timed_out_fn */
if (!q->mq_ops && !q->rq_timed_out_fn)
return;