linux-kernel - [ 82/82] asix: allow full size 8021Q frames to be received

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Date:	Fri, 08 Jun 2012 05:20:02 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Eric Dumazet <edumazet@...gle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Allan Chou <allan@...x.com.tw>,
	Trond Wuellner <trond@...omium.org>,
	Grant Grundler <grundler@...omium.org>,
	Paul Stewart <pstew@...omium.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 82/82] asix: allow full size 8021Q frames to be received

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

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

commit 9dae31009b1a00d926c6fe032d5a88099620adc3 upstream.

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>
Signed-off-by: David S. Miller <davem@...emloft.net>
[bwh: Backported to 3.2: no offset used in asix_rx_fixup()]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
--- 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 "08-Nov-2011"
 #define DRIVER_NAME "asix"
@@ -348,7 +349,7 @@
 			return 2;
 		}
 
-		if (size > dev->net->mtu + ETH_HLEN) {
+		if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
 			netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
 				   size);
 			return 0;


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