blk-mq: allow setting of per-request timeouts
Currently blk-mq uses the queue timeout for all requests. But
for some commands, drivers may want to set a specific timeout
for special requests. Allow this to be passed in through
request->timeout, and use it if set.
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 54e7886..9bc0753 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -454,9 +454,13 @@
/*
* Just mark start time and set the started bit. Due to memory
* ordering, we know we'll see the correct deadline as long as
- * REQ_ATOMIC_STARTED is seen.
+ * REQ_ATOMIC_STARTED is seen. Use the default queue timeout,
+ * unless one has been set in the request.
*/
- rq->deadline = jiffies + q->rq_timeout;
+ if (!rq->timeout)
+ rq->deadline = jiffies + q->rq_timeout;
+ else
+ rq->deadline = jiffies + rq->timeout;
/*
* Mark us as started and clear complete. Complete might have been