netdev - [PATCH net-next 06/27] net: xen: set zc flags only when there is ubuf

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Date:   Sun,  3 Apr 2022 14:06:18 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Eric Dumazet <edumazet@...gle.com>, Wei Liu <wei.liu@...nel.org>,
        Paul Durrant <paul@....org>,
        Pavel Begunkov <asml.silence@...il.com>
Subject: [PATCH net-next 06/27] net: xen: set zc flags only when there is ubuf

In preparation to changing zc ubuf invariants, set SKBFL_ZEROCOPY_ENABLE
IFF there is a ubuf set.

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 drivers/net/xen-netback/interface.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index fe8e21ad8ed9..0a0c36a38fd4 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -55,7 +55,8 @@
 void xenvif_skb_zerocopy_prepare(struct xenvif_queue *queue,
 				 struct sk_buff *skb)
 {
-	skb_shinfo(skb)->flags |= SKBFL_ZEROCOPY_ENABLE;
+	if (skb_uarg(skb))
+		skb_shinfo(skb)->flags |= SKBFL_ZEROCOPY_ENABLE;
 	atomic_inc(&queue->inflight_packets);
 }
 
-- 
2.35.1