blk-mq: Allow requests to never expire
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>
diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index 56c0258..246dfb1 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -190,6 +190,9 @@
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;