netdev - [PATCH] asix: allow full size 8021Q frames to be received

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Message-ID: <1338280301.4120.0.camel@edumazet-glaptop>
Date:	Tue, 29 May 2012 10:31:41 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Trond Wuellner <trond@...omium.org>,
	Grant Grundler <grundler@...omium.org>,
	Paul Stewart <pstew@...omium.org>,
	Allan Chou <allan@...x.com.tw>
Subject: [PATCH] asix: allow full size 8021Q frames to be received

From: Eric Dumazet <edumazet@...gle.com>

asix driver drops 8021Q full size frames because it doesn't take into
account VLAN header size.

Tested on AX88772 adapter.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: Allan Chou <allan@...x.com.tw>
CC: Trond Wuellner <trond@...omium.org>
CC: Grant Grundler <grundler@...omium.org>
CC: Paul Stewart <pstew@...omium.org>
---
drivers/net/usb/asix.c |    3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/asix.c b/drivers/net/usb/asix.c
index 71e2b05..3ae80ec 100644
--- a/drivers/net/usb/asix.c
+++ b/drivers/net/usb/asix.c
@@ -35,6 +35,7 @@
 #include <linux/crc32.h>
 #include <linux/usb/usbnet.h>
 #include <linux/slab.h>
+#include <linux/if_vlan.h>
 
 #define DRIVER_VERSION "22-Dec-2011"
 #define DRIVER_NAME "asix"
@@ -321,7 +322,7 @@ static int asix_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 			return 0;
 		}
 
-		if ((size > dev->net->mtu + ETH_HLEN) ||
+		if ((size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) ||
 		    (size + offset > skb->len)) {
 			netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
 				   size);



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