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

[Ben Hutchings]

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

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

From: Eric Dumazet <edumazet@xxxxxxxxxx>

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@xxxxxxxxxx>
CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
CC: Allan Chou <allan@xxxxxxxxxxx>
CC: Trond Wuellner <trond@xxxxxxxxxxxx>
CC: Grant Grundler <grundler@xxxxxxxxxxxx>
CC: Paul Stewart <pstew@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
[bwh: Backported to 3.2: no offset used in asix_rx_fixup()]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
--- 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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