virtio_ring: fix num_free handling in error case
commitpull/10/heade82df67023
upstream. The vq->vq.num_free hasn't been changed when error happens, so it shouldn't be changed when handling the error. Fixes:780bc7903a
("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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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5f9113db06
commit
583cc79b73
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@ -428,8 +428,6 @@ unmap_release:
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i = virtio16_to_cpu(_vq->vdev, vq->vring.desc[i].next);
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}
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vq->vq.num_free += total_sg;
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if (indirect)
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kfree(desc);
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