This reverts commit 78139c94dc8c96a478e67dab3bee84dc6eccb5fd. We don't protect device IOTLB with vq mutex, which will lead e.g use after free for device IOTLB entries. And since we've switched to use mutex_trylock() in previous patch, it's safe to revert it without having deadlock. Fixes: commit 78139c94dc8c ("net: vhost: lock the vqs one by one") Cc: Tonghao Zhang <xiangxia.m.yue@gmail.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>