nvme-core: use list_add_tail_rcu instead of list_add_tail for nvme_init_ns_head

The "list" of nvme_ns_head is used as rcu list, now in nvme_init_ns_head
list_add_tail is used to add ns->siblings to the rcu list. It is not safe.
Should use list_add_tail_rcu instead of list_add_tail.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 8caf9b34734dc75d6abf16cfdd68d0ef0f515551..f13eb4ded95fad0ddf6076ed29f7c63f5ca67984 100644 (file)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3829,7 +3829,7 @@ static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid,
                }
        }
 
-       list_add_tail(&ns->siblings, &head->list);
+       list_add_tail_rcu(&ns->siblings, &head->list);
        ns->head = head;
        mutex_unlock(&ctrl->subsys->lock);
        return 0;