4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bart Van Assche <bart.vanass...@sandisk.com>
commit bc27c01b5c46d3bfec42c96537c7a3fae0bb2cc4 upstream.
The meaning of the BLK_MQ_S_STOPPED flag is "do not call
.queue_rq()". Hence modify blk_mq_make_request() such that requests
are queued instead of issued if a queue has been stopped.
Reported-by: Ming Lei <tom.leim...@gmail.com>
Signed-off-by: Bart Van Assche <bart.vanass...@sandisk.com>
Reviewed-by: Christoph Hellwig <h...@lst.de>
Reviewed-by: Ming Lei <tom.leim...@gmail.com>
Reviewed-by: Hannes Reinecke <h...@suse.com>
Reviewed-by: Johannes Thumshirn <jthumsh...@suse.de>
Reviewed-by: Sagi Grimberg <s...@grimberg.me>
Signed-off-by: Jens Axboe <ax...@fb.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
block/blk-mq.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1332,9 +1332,9 @@ static blk_qc_t blk_mq_make_request(stru
blk_mq_put_ctx(data.ctx);
if (!old_rq)
goto done;
- if (!blk_mq_direct_issue_request(old_rq, &cookie))
- goto done;
- blk_mq_insert_request(old_rq, false, true, true);
+ if (test_bit(BLK_MQ_S_STOPPED, &data.hctx->state) ||
+ blk_mq_direct_issue_request(old_rq, &cookie) != 0)
+ blk_mq_insert_request(old_rq, false, true, true);
goto done;
}
