From: Will Deacon <willdea...@google.com> Move the attach and detach logic for manipulating vring descriptors out into their own functions so that we can later extend these to bounce the data for devices with VIRTIO_F_IOMMU_PLATFORM set.
Signed-off-by: Will Deacon <willdea...@google.com> [ Paul: pick from the Android tree. Rebase to the upstream ] Signed-off-by: Ying-Chun Liu (PaulLiu) <paul....@linaro.org> Cc: Bin Meng <bmeng...@gmail.com> Link: https://android.googlesource.com/platform/external/u-boot/+/f73258a4bfe968c5f935db45f2ec5cc0104ee796 --- drivers/virtio/virtio_ring.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 5aeb13fd59..1bd19add75 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -47,6 +47,10 @@ static unsigned int virtqueue_attach_desc(struct virtqueue *vq, unsigned int i, return desc_shadow->next; } +static void virtqueue_detach_desc(struct virtqueue *vq, unsigned int idx) +{ +} + int virtqueue_add(struct virtqueue *vq, struct virtio_sg *sgs[], unsigned int out_sgs, unsigned int in_sgs) { @@ -165,10 +169,12 @@ static void detach_buf(struct virtqueue *vq, unsigned int head) i = head; while (vq->vring_desc_shadow[i].flags & VRING_DESC_F_NEXT) { + virtqueue_detach_desc(vq, i); i = vq->vring_desc_shadow[i].next; vq->num_free++; } + virtqueue_detach_desc(vq, i); vq->vring_desc_shadow[i].next = vq->free_head; vq->free_head = head; -- 2.39.2
