From df18acca8eb13c8cf55fa45e9f9231dc51f64d98 Mon Sep 17 00:00:00 2001
From: Peter Korsgaard <jacmet@sunsite.dk>
Date: Wed, 13 May 2009 10:10:41 +0000
Subject: [PATCH] smsc95xx: strip ethernet fcs (crc) on receive path
The smsc95xx driver was forwarding the trailing fcs on received frames
up the stack leading to confusion in tcpdump.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Tested-by: Steve Glendinning <steve.glendinning@smsc.com>
Acked-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/usb/smsc95xx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 5a7283372b53d..89a91f8c22dea 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1134,7 +1134,7 @@ static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
if (skb->len == size) {
if (pdata->use_rx_csum)
smsc95xx_rx_csum_offload(skb);
-
+ skb_trim(skb, skb->len - 4); /* remove fcs */
skb->truesize = size + sizeof(struct sk_buff);
return 1;
@@ -1152,7 +1152,7 @@ static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
if (pdata->use_rx_csum)
smsc95xx_rx_csum_offload(ax_skb);
-
+ skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
ax_skb->truesize = size + sizeof(struct sk_buff);
usbnet_skb_return(dev, ax_skb);
--
2.30.2