int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
- struct nvme_ns_head *head = NULL;
+ struct nvme_ns_head *head = bdev->bd_disk->private_data;
void __user *argp = (void __user *)arg;
struct nvme_ns *ns;
- int srcu_idx, ret;
+ int srcu_idx, ret = -EWOULDBLOCK;
- ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx);
- if (unlikely(!ns))
- return -EWOULDBLOCK;
+ srcu_idx = srcu_read_lock(&head->srcu);
+ ns = nvme_find_path(head);
+ if (!ns)
+ goto out_unlock;
/*
* Handle ioctls that apply to the controller instead of the namespace
* deadlock when deleting namespaces using the passthrough interface.
*/
if (is_ctrl_ioctl(cmd))
- ret = nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx);
- else {
- ret = nvme_ns_ioctl(ns, cmd, argp);
- nvme_put_ns_from_disk(head, srcu_idx);
- }
+ return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx);
+ ret = nvme_ns_ioctl(ns, cmd, argp);
+out_unlock:
+ srcu_read_unlock(&head->srcu, srcu_idx);
return ret;
}