nvme-pci: unquiesce admin queue on shutdown

Just like IO queues, the admin queue also will not be restarted after a
controller shutdown. Unquiesce this queue so that we do not block
request dispatch on a permanently disabled controller.

Reported-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 3df0f2b..ac10d3a 100644 (file)
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2437,8 +2437,11 @@ static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown)
         * must flush all entered requests to their failed completion to avoid
         * deadlocking blk-mq hot-cpu notifier.
         */
-       if (shutdown)
+       if (shutdown) {
                nvme_start_queues(&dev->ctrl);
+               if (dev->ctrl.admin_q && !blk_queue_dying(dev->ctrl.admin_q))
+                       blk_mq_unquiesce_queue(dev->ctrl.admin_q);
+       }
        mutex_unlock(&dev->shutdown_lock);
 }