From: Hannes Reinecke <hare@suse.de>
Date: Sat, 5 Dec 2020 16:29:01 +0100
Subject: [PATCH] nvme: retrigger ANA log update if group descriptor isn't
 found
Patch-mainline: v5.13-rc1
Git-commit: dd8f7fa908f66dd44abcd83cbb50410524b9f8ef
References: bsc#1179137

If ANA is enabled but no ANA group descriptor is found when creating
a new namespace the ANA log is most likely out of date, so trigger
a re-read. The namespace will be tagged with the NS_ANA_PENDING flag
to exclude it from path selection until the ANA log has been re-read.

Reported-by: Martin George <marting@netapp.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/nvme/host/multipath.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 1da61a95f2d3..7a36a5ac0737 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -694,6 +694,10 @@ void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id)
 		if (desc.state) {
 			/* found the group desc: update */
 			nvme_update_ns_ana_state(&desc, ns);
+		} else {
+			/* group desc not found: trigger a re-read */
+			set_bit(NVME_NS_ANA_PENDING, &ns->flags);
+			queue_work(nvme_wq, &ns->ctrl->ana_work);
 		}
 	} else {
 		ns->ana_state = NVME_ANA_OPTIMIZED; 
-- 
2.29.2