You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
36 lines
1.2 KiB
36 lines
1.2 KiB
From b7c6d2675899cfff0180412c63fc9cbd5bacdb4d Mon Sep 17 00:00:00 2001
|
|
From: Eric Dumazet <edumazet@google.com>
|
|
Date: Wed, 19 Apr 2017 09:59:21 -0700
|
|
Subject: [PATCH] smsc75xx: use skb_cow_head() to deal with cloned skbs
|
|
|
|
We need to ensure there is enough headroom to push extra header,
|
|
but we also need to check if we are allowed to change headers.
|
|
|
|
skb_cow_head() is the proper helper to deal with this.
|
|
|
|
Fixes: d0cad871703b ("smsc75xx: SMSC LAN75xx USB gigabit ethernet adapter driver")
|
|
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/smsc75xx.c | 8 ++------
|
|
1 file changed, 2 insertions(+), 6 deletions(-)
|
|
|
|
--- a/drivers/net/usb/smsc75xx.c
|
|
+++ b/drivers/net/usb/smsc75xx.c
|
|
@@ -2205,13 +2205,9 @@ static struct sk_buff *smsc75xx_tx_fixup
|
|
{
|
|
u32 tx_cmd_a, tx_cmd_b;
|
|
|
|
- if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
|
|
- struct sk_buff *skb2 =
|
|
- skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
|
|
+ if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
|
|
dev_kfree_skb_any(skb);
|
|
- skb = skb2;
|
|
- if (!skb)
|
|
- return NULL;
|
|
+ return NULL;
|
|
}
|
|
|
|
tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
|
|
|