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[v3,4/9] nvme: host: unquiesce queue in nvme_kill_queues()

Message ID 20170531123706.20885-5-ming.lei@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ming Lei May 31, 2017, 12:37 p.m. UTC 
When nvme_kill_queues() is run, queues may be in
quiesced state, so we forcibly unquiesce queues to avoid
blocking dispatch, and I/O hang can be avoided in
remove path.

Peviously we use blk_mq_start_stopped_hw_queues() as
counterpart of blk_mq_quiesce_queue(), now we have
introduced blk_mq_unquiesce_queue(), so use it explicitly.

Cc: linux-nvme@lists.infradead.org
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 drivers/nvme/host/core.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index c3f189e54d10..e44326d5cf19 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2448,6 +2448,9 @@  void nvme_kill_queues(struct nvme_ctrl *ctrl)
 		revalidate_disk(ns->disk);
 		blk_set_queue_dying(ns->queue);
 
+		/* Forcibly unquiesce queues to avoid blocking dispatch */
+		blk_mq_unquiesce_queue(ns->queue);
+
 		/*
 		 * Forcibly start all queues to avoid having stuck requests.
 		 * Note that we must ensure the queues are not stopped