Re: [PATCH v2 3/3] block: Improve blk_mq_get_sq_hctx()

Since the introduction of blk_mq_get_hctx_type() the operation type in
the second argument of blk_mq_get_hctx_type() matters. Make sure that
blk_mq_get_sq_hctx() selects a hardware queue of type HCTX_TYPE_DEFAULT
instead of a hardware queue of type HCTX_TYPE_READ.

Cc: Ming Lei <redacted>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 block/blk-mq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index e9bf950983c7..7a5558bbc7f6 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c

@@ -2168,7 +2168,7 @@ static struct blk_mq_hw_ctx *blk_mq_get_sq_hctx(struct request_queue *q)
 	 * just causes lock contention inside the scheduler and pointless cache
 	 * bouncing.
 	 */
-	struct blk_mq_hw_ctx *hctx = blk_mq_map_queue(q, 0, ctx);
+	struct blk_mq_hw_ctx *hctx = ctx->hctxs[HCTX_TYPE_DEFAULT];
 
 	if (!blk_mq_hctx_stopped(hctx))
 		return hctx;