[PATCH AUTOSEL 5.11 53/61] nvme-core: check ctrl css before setting up zns

[Sasha Levin]

From: Chaitanya Kulkarni <chaitanya.kulkarni at wdc.com>

[ Upstream commit 0ec84df4953bd42c6583a555773f1d4996a061eb ]

Ensure multiple Command Sets are supported before starting to setup a
ZNS namespace.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni at wdc.com>
[hch: move the check around a bit]
Signed-off-by: Christoph Hellwig <hch at lst.de>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 drivers/nvme/host/core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 28bfe5bbf769..e5cc92a6a16d 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4081,6 +4081,12 @@ static void nvme_validate_or_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
 				nsid);
 			break;
 		}
+		if (!nvme_multi_css(ctrl)) {
+			dev_warn(ctrl->device,
+				"command set not reported for nsid: %d\n",
+				ns->head->ns_id);
+			break;
+		}
 		nvme_alloc_ns(ctrl, nsid, &ids);
 		break;
 	default:
-- 
2.30.1