diff options
| -rw-r--r-- | block/blk-timeout.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/blk-timeout.c b/block/blk-timeout.c index aa40aa93381b..3610af561748 100644 --- a/block/blk-timeout.c +++ b/block/blk-timeout.c @@ -186,6 +186,7 @@ unsigned long blk_rq_timeout(unsigned long timeout) * Notes: * Each request has its own timer, and as it is added to the queue, we * set up the timer. When the request completes, we cancel the timer. + * Queue lock must be held for the non-mq case, mq case doesn't care. */ void blk_add_timer(struct request *req) { @@ -209,6 +210,11 @@ void blk_add_timer(struct request *req) req->timeout = q->rq_timeout; req->deadline = jiffies + req->timeout; + + /* + * Only the non-mq case needs to add the request to a protected list. + * For the mq case we simply scan the tag map. + */ if (!q->mq_ops) list_add_tail(&req->timeout_list, &req->q->timeout_list); |