[PATCH 5.15 049/201] nvme: check for duplicate identifiers earlier

Greg Kroah-Hartman
2022-07-27T17:05:30Z

From: Christoph Hellwig <hch@lst.de>

[ Upstream commit e2d77d2e11c4f1e70a1a24cc8fe63ff3dc9b53ef ]

Lift the check for duplicate identifiers into nvme_init_ns_head, which
avoids pointless error unwinding in case they don't match, and also
matches where we check identifier validity for the multipath case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvme/host/core.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 29b56ea01132..8fca84d44446 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3686,13 +3686,6 @@ static struct nvme_ns_head *nvme_alloc_ns_head(struct nvme_ctrl *ctrl,
head->ids = *ids;
kref_init(&head->ref);

- ret = nvme_subsys_check_duplicate_ids(ctrl->subsys, &head->ids);
- if (ret) {
- dev_err(ctrl->device,
- "duplicate IDs for nsid %d\n", nsid);
- goto out_cleanup_srcu;
- }
-
if (head->ids.csi) {
ret = nvme_get_effects_log(ctrl, head->ids.csi, &head->effects);
if (ret)
@@ -3731,6 +3724,12 @@ static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid,
mutex_lock(&ctrl->subsys->lock);
head = nvme_find_ns_head(ctrl, nsid);
if (!head) {
+ ret = nvme_subsys_check_duplicate_ids(ctrl->subsys, ids);
+ if (ret) {
+ dev_err(ctrl->device,
+ "duplicate IDs for nsid %d\n", nsid);
+ goto out_unlock;
+ }
head = nvme_alloc_ns_head(ctrl, nsid, ids);
if (IS_ERR(head)) {
ret = PTR_ERR(head);
--
2.35.1