diff options
Diffstat (limited to 'target/linux/generic/patches-4.4/030-7-kaweth-use-skb_cow_head-to-deal-with-cloned-skbs.patch')
| -rw-r--r-- | target/linux/generic/patches-4.4/030-7-kaweth-use-skb_cow_head-to-deal-with-cloned-skbs.patch | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/target/linux/generic/patches-4.4/030-7-kaweth-use-skb_cow_head-to-deal-with-cloned-skbs.patch b/target/linux/generic/patches-4.4/030-7-kaweth-use-skb_cow_head-to-deal-with-cloned-skbs.patch deleted file mode 100644 index 541c694bec..0000000000 --- a/target/linux/generic/patches-4.4/030-7-kaweth-use-skb_cow_head-to-deal-with-cloned-skbs.patch +++ /dev/null @@ -1,43 +0,0 @@ -From 39fba7835aacda65284a86e611774cbba71dac20 Mon Sep 17 00:00:00 2001 -From: Eric Dumazet <edumazet@google.com> -Date: Wed, 19 Apr 2017 09:59:26 -0700 -Subject: [PATCH] kaweth: use skb_cow_head() to deal with cloned skbs - -We can use skb_cow_head() to properly deal with clones, -especially the ones coming from TCP stack that allow their head being -modified. This avoids a copy. - -Signed-off-by: Eric Dumazet <edumazet@google.com> -Cc: James Hughes <james.hughes@raspberrypi.org> -Signed-off-by: David S. Miller <davem@davemloft.net> ---- - drivers/net/usb/kaweth.c | 18 ++++++------------ - 1 file changed, 6 insertions(+), 12 deletions(-) - ---- a/drivers/net/usb/kaweth.c -+++ b/drivers/net/usb/kaweth.c -@@ -812,18 +812,12 @@ static netdev_tx_t kaweth_start_xmit(str - } - - /* We now decide whether we can put our special header into the sk_buff */ -- if (skb_cloned(skb) || skb_headroom(skb) < 2) { -- /* no such luck - we make our own */ -- struct sk_buff *copied_skb; -- copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); -- dev_kfree_skb_irq(skb); -- skb = copied_skb; -- if (!copied_skb) { -- kaweth->stats.tx_errors++; -- netif_start_queue(net); -- spin_unlock_irq(&kaweth->device_lock); -- return NETDEV_TX_OK; -- } -+ if (skb_cow_head(skb, 2)) { -+ kaweth->stats.tx_errors++; -+ netif_start_queue(net); -+ spin_unlock_irq(&kaweth->device_lock); -+ dev_kfree_skb_any(skb); -+ return NETDEV_TX_OK; - } - - private_header = (__le16 *)__skb_push(skb, 2); |