From: Christoph Hellwig <hch@lst.de>
Date: Wed, 7 Apr 2021 13:03:16 +0000 (+0200)
Subject: nvme: let namespace probing continue for unsupported features
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a9e0e6bc728ebcfe9f6acdca84e5c6cafee895cf;p=linux.git

nvme: let namespace probing continue for unsupported features

Instead of failing to scan the namespace entirely when unsupported
features are detected, just mark the gendisk hidden but allow other
access like the upcoming per-namespace character device.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Javier González <javier.gonz@samsung.com>
---

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index ded60d50fc564..288ac47ff5b47 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1832,7 +1832,7 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_id_ns *id)
 	if (blk_queue_is_zoned(ns->queue)) {
 		ret = nvme_revalidate_zones(ns);
 		if (ret && !nvme_first_scan(ns->disk))
-			return ret;
+			goto out;
 	}
 
 	if (nvme_ns_head_multipath(ns->head)) {
@@ -1847,6 +1847,15 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_id_ns *id)
 
 out_unfreeze:
 	blk_mq_unfreeze_queue(ns->disk->queue);
+out:
+	/*
+	 * If probing fails due an unsupported feature, hide the block device,
+	 * but still allow other access.
+	 */
+	if (ret == -ENODEV) {
+		ns->disk->flags |= GENHD_FL_HIDDEN;
+		ret = 0;
+	}
 	return ret;
 }
 
diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c
index bc2f344f0ae01..475dd45c3db49 100644
--- a/drivers/nvme/host/zns.c
+++ b/drivers/nvme/host/zns.c
@@ -96,7 +96,7 @@ int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
 		dev_warn(ns->ctrl->device,
 			"zone operations:%x not supported for namespace:%u\n",
 			le16_to_cpu(id->zoc), ns->head->ns_id);
-		status = -EINVAL;
+		status = -ENODEV;
 		goto free_data;
 	}
 
@@ -105,7 +105,7 @@ int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
 		dev_warn(ns->ctrl->device,
 			"invalid zone size:%llu for namespace:%u\n",
 			ns->zsze, ns->head->ns_id);
-		status = -EINVAL;
+		status = -ENODEV;
 		goto free_data;
 	}