[PATCH] nvme: reject the ns when the block size is smaller than a sector

[Li Feng <fengli@smartx.com>]

The nvme spec(1.4a, figure 248) says:
"A value smaller than 9 (i.e., 512 bytes) is not supported."

Signed-off-by: Li Feng <fengli@smartx.com>
---
 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 f320273fc672..1f02e6e49a05 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2161,6 +2161,12 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_id_ns *id)
 
 	blk_mq_freeze_queue(ns->disk->queue);
 	ns->lba_shift = id->lbaf[lbaf].ds;
+	if (ns->lba_shift < 9) {
+		pr_warn("%s: bad lba_shift(%d)\n", ns->disk->disk_name, ns->lba_shift);
+		ret = -1;
+		goto out_unfreeze;
+	}
+
 	nvme_set_queue_limits(ns->ctrl, ns->queue);
 
 	if (ns->head->ids.csi == NVME_CSI_ZNS) {
-- 
2.29.2