From: Vincent Whitchurch <vincent.whitchurch@axis.com> To: "Michael S. Tsirkin" <mst@redhat.com>, Jason Wang <jasowang@redhat.com> Cc: <kernel@axis.com>, Vincent Whitchurch <vincent.whitchurch@axis.com>, <virtualization@lists.linux-foundation.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH] virtio-ring: fix DMA metadata flags Date: Tue, 26 Oct 2021 15:31:00 +0200 [thread overview] Message-ID: <20211026133100.17541-1-vincent.whitchurch@axis.com> (raw) 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> --- drivers/virtio/virtio_ring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index dd95dfd85e98..3035bb6f5458 100644 --- 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) { -- 2.28.0
WARNING: multiple messages have this Message-ID (diff)
From: Vincent Whitchurch <vincent.whitchurch@axis.com> To: "Michael S. Tsirkin" <mst@redhat.com>, Jason Wang <jasowang@redhat.com> Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>, kernel@axis.com, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: [PATCH] virtio-ring: fix DMA metadata flags Date: Tue, 26 Oct 2021 15:31:00 +0200 [thread overview] Message-ID: <20211026133100.17541-1-vincent.whitchurch@axis.com> (raw) 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> --- drivers/virtio/virtio_ring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index dd95dfd85e98..3035bb6f5458 100644 --- 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) { -- 2.28.0 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
next reply other threads:[~2021-10-26 13:31 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-26 13:31 Vincent Whitchurch [this message] 2021-10-26 13:31 ` [PATCH] virtio-ring: fix DMA metadata flags Vincent Whitchurch 2021-10-27 2:32 ` Jason Wang 2021-10-27 2:32 ` Jason Wang
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