[PATCH 3/5] blk-mq: move the blk_mq_hctx_stopped check in __blk_mq_delay_run_hw_queue

[Christoph Hellwig <hch@lst.de>]

For the in-context dispatch, blk_mq_hctx_stopped is alredy checked in
blk_mq_sched_dispatch_requests under blk_mq_run_dispatch_ops() protetion.
For the async dispatch case having a check before scheduling the work
still makes sense to avoid needless workqueue scheduling, so just keep
it for that case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/blk-mq.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 5289a34e68b937..e0c914651f7946 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2212,9 +2212,6 @@ static int blk_mq_hctx_next_cpu(struct blk_mq_hw_ctx *hctx)
 static void __blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async,
 					unsigned long msecs)
 {
-	if (unlikely(blk_mq_hctx_stopped(hctx)))
-		return;
-
 	if (!async && !(hctx->flags & BLK_MQ_F_BLOCKING)) {
 		if (cpumask_test_cpu(raw_smp_processor_id(), hctx->cpumask)) {
 			__blk_mq_run_hw_queue(hctx);
@@ -2222,6 +2219,8 @@ static void __blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async,
 		}
 	}
 
+	if (unlikely(blk_mq_hctx_stopped(hctx)))
+		return;
 	kblockd_mod_delayed_work_on(blk_mq_hctx_next_cpu(hctx), &hctx->run_work,
 				    msecs_to_jiffies(msecs));
 }
-- 
2.39.2