virtio: Use the sg_phys convenience function.

Simple cleanup.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 9859213..74c2450 100644 (file)
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -99,16 +99,14 @@ static int vring_add_buf(struct virtqueue *_vq,
        head = vq->free_head;
        for (i = vq->free_head; out; i = vq->vring.desc[i].next, out--) {
                vq->vring.desc[i].flags = VRING_DESC_F_NEXT;
-               vq->vring.desc[i].addr = (page_to_pfn(sg_page(sg))<<PAGE_SHIFT)
-                       + sg->offset;
+               vq->vring.desc[i].addr = sg_phys(sg);
                vq->vring.desc[i].len = sg->length;
                prev = i;
                sg++;
        }
        for (; in; i = vq->vring.desc[i].next, in--) {
                vq->vring.desc[i].flags = VRING_DESC_F_NEXT|VRING_DESC_F_WRITE;
-               vq->vring.desc[i].addr = (page_to_pfn(sg_page(sg))<<PAGE_SHIFT)
-                       + sg->offset;
+               vq->vring.desc[i].addr = sg_phys(sg);
                vq->vring.desc[i].len = sg->length;
                prev = i;
                sg++;