[PATCH v2] nvmet: reject invalid write-protect feature values

[Sreeraj S Kurup <sreekuttan2156239@gmail.com>]

The Set Features handler for namespace write protection currently
accepts unsupported values. The default case in the write-protect
switch leaves the status unchanged, causing the command to return
success even though no valid setting was applied.

Return NVME_SC_INVALID_FIELD | NVME_STATUS_DNR for unsupported
values. This also prevents issuing a namespace-change notification
for an invalid request.

Fixes: 3a1f7c79ae6d ("nvmet: make nvmet_find_namespace() req based")
Signed-off-by: Sreeraj S Kurup <sreekuttan2156239@gmail.com>
---
v2:
 - Add Fixes trailer

 drivers/nvme/target/admin-cmd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index f12d83098644..ee8be237485e 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -1223,6 +1223,7 @@ static u16 nvmet_set_feat_write_protect(struct nvmet_req *req)
 		status = 0;
 		break;
 	default:
+		status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
 		break;
 	}
 
-- 
2.55.0