This patch introduce a new function that frees the rest mergeable buf.
The subsequent patch will reuse this function.
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
---
drivers/net/virtio_net.c | 36 ++++++++++++++++++++++++------------
1 file changed, 24 insertions(+), 12 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 5cec4b418110..e2eade87d2d4 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1078,6 +1078,28 @@ static struct sk_buff *receive_big(struct net_device *dev,
return NULL;
}
+static void mergeable_buf_free(struct receive_queue *rq, int num_buf,
+ struct net_device *dev,
+ struct virtnet_rq_stats *stats)
+{
+ struct page *page;
+ void *buf;
+ int len;
+
+ while (num_buf-- > 1) {
+ buf = virtqueue_get_buf(rq->vq, &len);
+ if (unlikely(!buf)) {
+ pr_debug("%s: rx error: %d buffers missing\n",
+ dev->name, num_buf);
+ dev->stats.rx_length_errors++;
+ break;
+ }
+ stats->bytes += len;
+ page = virt_to_head_page(buf);
+ put_page(page);
+ }
+}
+
/* Why not use xdp_build_skb_from_frame() ?
* XDP core assumes that xdp frags are PAGE_SIZE in length, while in
* virtio-net there are 2 points that do not match its requirements:
@@ -1439,18 +1461,8 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
stats->xdp_drops++;
err_skb:
put_page(page);
- while (num_buf-- > 1) {
- buf = virtqueue_get_buf(rq->vq, &len);
- if (unlikely(!buf)) {
- pr_debug("%s: rx error: %d buffers missing\n",
- dev->name, num_buf);
- dev->stats.rx_length_errors++;
- break;
- }
- stats->bytes += len;
- page = virt_to_head_page(buf);
- put_page(page);
- }
+ mergeable_buf_free(rq, num_buf, dev, stats);
+
err_buf:
stats->drops++;
dev_kfree_skb(head_skb);
--
2.32.0.3.g01195cf9f
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