virtio_ring: fix num_free handling in error case
authorTiwei Bie <tiwei.bie@intel.com>
Fri, 23 Feb 2018 11:41:30 +0000 (19:41 +0800)
committerMichael S. Tsirkin <mst@redhat.com>
Thu, 1 Mar 2018 16:53:38 +0000 (18:53 +0200)
commite82df670235138575b37ff0ec24412a471efd97f
tree7bc79c1cdbaeee6e5ca9eba7a900bea363bda2f4
parent4a3928c6f8a53fa1aed28ccba227742486e8ddcb
virtio_ring: fix num_free handling in error case

The vq->vq.num_free hasn't been changed when error happens,
so it shouldn't be changed when handling the error.

Fixes: 780bc7903a32 ("virtio_ring: Support DMA APIs")
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
drivers/virtio/virtio_ring.c