diff mbox series

[net-next,v3,11/15] virtio_net: small: optimize code

Message ID 20230423105736.56918-12-xuanzhuo@linux.alibaba.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series virtio_net: refactor xdp codes | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/cc_maintainers success CCed 13 of 13 maintainers
netdev/build_clang fail Errors and warnings before: 13 this patch: 13
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn fail Errors and warnings before: 14 this patch: 14
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 31 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Xuan Zhuo April 23, 2023, 10:57 a.m. UTC 
In the case of XDP-PASS, skb_reserve uses the delta to compatible
non-XDP, now remove this logic.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 drivers/net/virtio_net.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 9b5fd2e0d27f..5bc3dca0f60c 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -949,9 +949,7 @@  static struct sk_buff *receive_small_xdp(struct net_device *dev,
 	unsigned int buflen;
 	struct xdp_buff xdp;
 	struct sk_buff *skb;
-	unsigned int delta = 0;
 	unsigned int metasize = 0;
-	void *orig_data;
 	u32 act;
 
 	if (unlikely(hdr->hdr.gso_type))
@@ -984,14 +982,12 @@  static struct sk_buff *receive_small_xdp(struct net_device *dev,
 	xdp_init_buff(&xdp, buflen, &rq->xdp_rxq);
 	xdp_prepare_buff(&xdp, buf + VIRTNET_RX_PAD + vi->hdr_len,
 			 xdp_headroom, len, true);
-	orig_data = xdp.data;
 
 	act = virtnet_xdp_handler(xdp_prog, &xdp, dev, xdp_xmit, stats);
 
 	switch (act) {
 	case XDP_PASS:
 		/* Recalculate length in case bpf program changed it */
-		delta = orig_data - xdp.data;
 		len = xdp.data_end - xdp.data;
 		metasize = xdp.data - xdp.data_meta;
 		break;
@@ -1008,7 +1004,7 @@  static struct sk_buff *receive_small_xdp(struct net_device *dev,
 	if (!skb)
 		goto err;
 
-	skb_reserve(skb, headroom - delta);
+	skb_reserve(skb, xdp.data - buf);
 	skb_put(skb, len);
 	if (metasize)
 		skb_metadata_set(skb, metasize);