From: Keith Busch <keith.busch@intel.com>
Date: Wed, 27 Apr 2016 21:51:18 +0000 (-0600)
Subject: NVMe: Fix check_flush_dependency warning
X-Git-Tag: v4.7-rc1~156^2~39
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3b24774e1fb90a40836e96e39a851a774679efff;p=platform%2Fkernel%2Flinux-exynos.git

NVMe: Fix check_flush_dependency warning

If the controller fails and is degraded after a reset, we need to kill
off all requests queues before removing the inaccessble namespaces. This
will prevent del_gendisk from syncing dirty data, which we can't due
from a WQ_MEM_RECLAIM work queue.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index ff3c8d7..cc46fdf 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1887,6 +1887,7 @@ static void nvme_reset_work(struct work_struct *work)
 	 */
 	if (dev->online_queues < 2) {
 		dev_warn(dev->ctrl.device, "IO queues not created\n");
+		nvme_kill_queues(&dev->ctrl);
 		nvme_remove_namespaces(&dev->ctrl);
 	} else {
 		nvme_start_queues(&dev->ctrl);