diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index d00a87909a7e..aafe1969b45e 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -86,6 +86,9 @@ struct vring_desc_state_split { struct vring_virtqueue { struct virtqueue vq; + /* Is DMA API used? */ + bool use_dma_api; + /* Can we use weak barriers? */ bool weak_barriers; @@ -262,7 +265,7 @@ static dma_addr_t vring_map_one_sg(const struct vring_virtqueue *vq, struct scatterlist *sg, enum dma_data_direction direction) { - if (!vring_use_dma_api(vq->vq.vdev)) + if (!vq->use_dma_api) return (dma_addr_t)sg_phys(sg); /* @@ -279,7 +282,7 @@ static dma_addr_t vring_map_single(const struct vring_virtqueue *vq, void *cpu_addr, size_t size, enum dma_data_direction direction) { - if (!vring_use_dma_api(vq->vq.vdev)) + if (!vq->use_dma_api) return (dma_addr_t)virt_to_phys(cpu_addr); return dma_map_single(vring_dma_dev(vq), @@ -289,7 +292,7 @@ static dma_addr_t vring_map_single(const struct vring_virtqueue *vq, static int vring_mapping_error(const struct vring_virtqueue *vq, dma_addr_t addr) { - if (!vring_use_dma_api(vq->vq.vdev)) + if (!vq->use_dma_api) return 0; return dma_mapping_error(vring_dma_dev(vq), addr); @@ -305,7 +308,7 @@ static void vring_unmap_one_split(const struct vring_virtqueue *vq, { u16 flags; - if (!vring_use_dma_api(vq->vq.vdev)) + if (!vq->use_dma_api) return; flags = virtio16_to_cpu(vq->vq.vdev, desc->flags); @@ -1202,6 +1205,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, vq->broken = false; vq->last_used_idx = 0; vq->num_added = 0; + vq->use_dma_api = vring_use_dma_api(vdev); list_add_tail(&vq->vq.list, &vdev->vqs); #ifdef DEBUG vq->in_use = false; |