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virtio-ring: fix DMA metadata flags
author
Vincent Whitchurch
<vincent.whitchurch@axis.com>
Tue, 26 Oct 2021 13:31:00 +0000
(15:31 +0200)
committer
Michael S. Tsirkin
<mst@redhat.com>
Wed, 27 Oct 2021 19:54:34 +0000
(15:54 -0400)
The flags are currently overwritten, leading to the wrong direction
being passed to the DMA unmap functions.
Fixes:
72b5e8958738aaa4
("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>
drivers/virtio/virtio_ring.c
patch
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diff --git
a/drivers/virtio/virtio_ring.c
b/drivers/virtio/virtio_ring.c
index
dd95dfd
..
3035bb6
100644
(file)
--- a/
drivers/virtio/virtio_ring.c
+++ b/
drivers/virtio/virtio_ring.c
@@
-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) {