[PATCH AUTOSEL 5.10 47/54] nvme-core: check ctrl css before setting up zns

[Sasha Levin]

From: Chaitanya Kulkarni <chaitanya.kulka...@wdc.com>

[ Upstream commit 0ec84df4953bd42c6583a555773f1d4996a061eb ]

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

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulka...@wdc.com>
[hch: move the check around a bit]
Signed-off-by: Christoph Hellwig <h...@lst.de>
Signed-off-by: Sasha Levin <sas...@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 a684168fa4a3..66247f8776b7 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4031,6 +4031,12 @@ 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