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virtio_ring: Merge identical variables

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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>
This commit is contained in:
Andrew Scull 2022-05-16 10:41:29 +00:00 committed by Tom Rini
parent ed1cbbe2af
commit 68f8bf21c7
1 changed files with 3 additions and 4 deletions
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7
drivers/virtio/virtio_ring.c
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@ -20,17 +20,16 @@ int virtqueue_add(struct virtqueue *vq, struct virtio_sg *sgs[],
unsigned int out_sgs, unsigned int in_sgs) unsigned int out_sgs, unsigned int in_sgs)
{ {
struct vring_desc *desc; struct vring_desc *desc;
unsigned int total_sg = out_sgs + in_sgs; unsigned int descs_used = out_sgs + in_sgs;
unsigned int i, n, avail, descs_used, uninitialized_var(prev); unsigned int i, n, avail, uninitialized_var(prev);
int head; int head;
WARN_ON(total_sg == 0); WARN_ON(descs_used == 0);
head = vq->free_head; head = vq->free_head;
desc = vq->vring.desc; desc = vq->vring.desc;
i = head; i = head;
descs_used = total_sg;
if (vq->num_free < descs_used) { if (vq->num_free < descs_used) {
debug("Can't add buf len %i - avail = %i\n", debug("Can't add buf len %i - avail = %i\n",