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nvme: Suppress static analyis warning 

The ns->head is always valid, so we don't need to check for NULL.

Reported-by: Dan Carpenter <dan.caprenter@oracle.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Keith Busch 2017-11-16 13:36:50 -07:00 committed by Christoph Hellwig
parent b0d61d586f
commit 9941a862cc
1 changed files with 2 additions and 5 deletions
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7
drivers/nvme/host/core.c
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@ -2961,8 +2961,6 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
static void nvme_ns_remove(struct nvme_ns *ns)
{
struct nvme_ns_head *head = ns->head;
if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags))
return;
@ -2980,15 +2978,14 @@ static void nvme_ns_remove(struct nvme_ns *ns)
mutex_lock(&ns->ctrl->subsys->lock);
nvme_mpath_clear_current_path(ns);
if (head)
list_del_rcu(&ns->siblings);
list_del_rcu(&ns->siblings);
mutex_unlock(&ns->ctrl->subsys->lock);
mutex_lock(&ns->ctrl->namespaces_mutex);
list_del_init(&ns->list);
mutex_unlock(&ns->ctrl->namespaces_mutex);
synchronize_srcu(&head->srcu);
synchronize_srcu(&ns->head->srcu);
nvme_put_ns(ns);
}