From 1a9aa23e139f1305c1b8e1609e8275ed7456c9ba Mon Sep 17 00:00:00 2001
From: Rabin Vincent <rabin@rab.in>
Date: Thu, 29 Mar 2012 07:15:15 +0000
Subject: [PATCH 05/60] net: usb: cdc_eem: fix mtu

[ Upstream commit 78fb72f7936c01d5b426c03a691eca082b03f2b9 ]

Make CDC EEM recalculate the hard_mtu after adjusting the
hard_header_len.

Without this, usbnet adjusts the MTU down to 1494 bytes, and the host is
unable to receive standard 1500-byte frames from the device.

Tested with the Linux USB Ethernet gadget.

Cc: Oliver Neukum <oliver@neukum.name>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/usb/cdc_eem.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/usb/cdc_eem.c b/drivers/net/usb/cdc_eem.c
index 882f53f..82d43b2 100644
--- a/drivers/net/usb/cdc_eem.c
+++ b/drivers/net/usb/cdc_eem.c
@@ -93,6 +93,7 @@ static int eem_bind(struct usbnet *dev, struct usb_interface *intf)
 	/* no jumbogram (16K) support for now */
 
 	dev->net->hard_header_len += EEM_HEAD + ETH_FCS_LEN;
+	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
 
 	return 0;
 }
-- 
1.7.9.5

