[dm-devel] [PATCHv2 4/4] block: blk-mq support for cloned requests

[Keith Busch]

Use blk-mq to insert cloned requests if it was allocated from a
multi-queue block driver.

Signed-off-by: Keith Busch <keith.busch at intel.com>
---
 block/blk-core.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/block/blk-core.c b/block/blk-core.c
index 3abbc04..4c5952b 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2031,6 +2031,11 @@ int blk_insert_cloned_request(struct request_queue *q, struct request *rq)
 	    should_fail_request(&rq->rq_disk->part0, blk_rq_bytes(rq)))
 		return -EIO;
 
+	if (q->mq_ops) {
+		blk_mq_insert_request(rq, false, true, true);
+		return 0;
+	}
+
 	spin_lock_irqsave(q->queue_lock, flags);
 	if (unlikely(blk_queue_dying(q))) {
 		spin_unlock_irqrestore(q->queue_lock, flags);
-- 
1.7.10.4