[dm-devel] [PATCH v3 3/8] block: add blk-mq support to blk_insert_cloned_request()

[Mike Snitzer]

From: Keith Busch <keith.busch at intel.com>

If the request passed to blk_insert_cloned_request() was allocated by
a blk-mq device it must be submitted using blk_mq_insert_request().

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

diff --git a/block/blk-core.c b/block/blk-core.c
index b794cd99..7852844 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2029,6 +2029,11 @@ 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);
-- 
1.9.3