virtio_ring: Merge identical variables

The variables `total_sg` and `descs_used` have the same value. Replace
the few uses of `total_sg` with `descs_used` to simplify the situation.

Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 7f1cbc5..a6922ce 100644 (file)
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -20,17 +20,16 @@ int virtqueue_add(struct virtqueue *vq, struct virtio_sg *sgs[],
                  unsigned int out_sgs, unsigned int in_sgs)
 {
        struct vring_desc *desc;
-       unsigned int total_sg = out_sgs + in_sgs;
-       unsigned int i, n, avail, descs_used, uninitialized_var(prev);
+       unsigned int descs_used = out_sgs + in_sgs;
+       unsigned int i, n, avail, uninitialized_var(prev);
        int head;
 
-       WARN_ON(total_sg == 0);
+       WARN_ON(descs_used == 0);
 
        head = vq->free_head;
 
        desc = vq->vring.desc;
        i = head;
-       descs_used = total_sg;
 
        if (vq->num_free < descs_used) {
                debug("Can't add buf len %i - avail = %i\n",