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Code Issues Releases Wiki Activity

virtio-ring: fix DMA metadata flags 

The flags are currently overwritten, leading to the wrong direction
being passed to the DMA unmap functions.

Fixes: 72b5e89587 ("virtio-ring: store DMA metadata in desc_extra for split virtqueue")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20211026133100.17541-1-vincent.whitchurch@axis.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Vincent Whitchurch 2021-10-26 15:31:00 +02:00 committed by Michael S. Tsirkin
parent 0943aacf5a
commit 890d335613
1 changed files with 1 additions and 1 deletions
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2
drivers/virtio/virtio_ring.c
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@ -576,7 +576,7 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
/* Last one doesn't continue. */
desc[prev].flags &= cpu_to_virtio16(_vq->vdev, ~VRING_DESC_F_NEXT);
if (!indirect && vq->use_dma_api)
vq->split.desc_extra[prev & (vq->split.vring.num - 1)].flags =
vq->split.desc_extra[prev & (vq->split.vring.num - 1)].flags &=
~VRING_DESC_F_NEXT;
if (indirect) {