linux-kernel - [PATCH 5.10 069/142] blk-mq: test QUEUE_FLAG_HCTX_ACTIVE for sbitmap_shared in hctx_may

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Date:   Tue,  2 Feb 2021 14:37:12 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, John Garry <john.garry@...wei.com>,
        Kashyap Desai <kashyap.desai@...adcom.com>,
        Ming Lei <ming.lei@...hat.com>, Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 5.10 069/142] blk-mq: test QUEUE_FLAG_HCTX_ACTIVE for sbitmap_shared in hctx_may_queue

From: Ming Lei <ming.lei@...hat.com>

commit 2569063c7140c65a0d0ad075e95ddfbcda9ba3c0 upstream.

In case of blk_mq_is_sbitmap_shared(), we should test QUEUE_FLAG_HCTX_ACTIVE against
q->queue_flags instead of BLK_MQ_S_TAG_ACTIVE.

So fix it.

Cc: John Garry <john.garry@...wei.com>
Cc: Kashyap Desai <kashyap.desai@...adcom.com>
Fixes: f1b49fdc1c64 ("blk-mq: Record active_queues_shared_sbitmap per tag_set for when using shared sbitmap")
Signed-off-by: Ming Lei <ming.lei@...hat.com>
Reviewed-by: John Garry <john.garry@...wei.com>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 block/blk-mq.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -303,7 +303,7 @@ static inline bool hctx_may_queue(struct
 		struct request_queue *q = hctx->queue;
 		struct blk_mq_tag_set *set = q->tag_set;
 
-		if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &q->queue_flags))
+		if (!test_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags))
 			return true;
 		users = atomic_read(&set->active_queues_shared_sbitmap);
 	} else {