From: Luis Chamberlain <mcgrof@kernel.org>
Date: Mon, 30 Aug 2021 14:25:33 -0700
Subject: nvme: add error handling support for add_disk()
Patch-mainline: v5.15-rc1
Git-commit: ab3994f6efba95e0832dc9e68c088b2d7ae764b8
References: jsc#PED-1183
We never checked for errors on add_disk() as this function
returned void. Now that this is fixed, use the shiny new
error handling.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
drivers/nvme/host/core.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3798,7 +3798,9 @@ static void nvme_alloc_ns(struct nvme_ct
nvme_get_ctrl(ctrl);
- device_add_disk(ctrl->device, ns->disk, nvme_ns_id_attr_groups);
+ if (device_add_disk(ctrl->device, ns->disk, nvme_ns_id_attr_groups))
+ goto out_cleanup_ns_from_list;
+
if (!nvme_ns_head_multipath(ns->head))
nvme_add_ns_cdev(ns);
@@ -3808,6 +3810,11 @@ static void nvme_alloc_ns(struct nvme_ct
return;
+ out_cleanup_ns_from_list:
+ nvme_put_ctrl(ctrl);
+ down_write(&ctrl->namespaces_rwsem);
+ list_del_init(&ns->list);
+ up_write(&ctrl->namespaces_rwsem);
out_unlink_ns:
mutex_lock(&ctrl->subsys->lock);
list_del_rcu(&ns->siblings);