On 11/3/20 1:51 AM, xiubli@xxxxxxxxxx wrote:
From: Xiubo Li <xiubli@xxxxxxxxxx> When calling the ioctl(), fget() will be called on this fd, and nbd_release() is only called when the fd's refcount drops to zero. With this we can make sure that the nbd_release() won't be called before the ioctl() finished. So there won't have the double lock issue for the "config_lock", which has already been held by nbd_ioctl(). Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx> Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx>
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx> Thanks, Josef
