From 907c1a91cc58237c61bd32f16c50d6a461446bf1 Mon Sep 17 00:00:00 2001
From: juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Fri, 20 Dec 2013 11:41:23 +0000
Subject: [PATCH] ar71xx: allow to use large ethernet frames on AR934x SoCs

The hardware supports large ethernet frames. Override
the maximum frame length and packet lenght mask in the
platform data to allow to use large MTU on the ethernet
interfaces.

Limit the feature to AR934x SoCs for now. It should work
on some other SoCs as well, but those has not been tested
yet.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39149 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
index 8b54d0c817..da67478fe6 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
@@ -20,6 +20,7 @@
 #include <linux/platform_device.h>
 #include <linux/serial_8250.h>
 #include <linux/clk.h>
+#include <linux/sizes.h>
 
 #include <asm/mach-ath79/ath79.h>
 #include <asm/mach-ath79/ar71xx_regs.h>
@@ -958,6 +959,9 @@ void __init ath79_register_eth(unsigned int id)
 		pdata->has_gbit = 1;
 		pdata->is_ar724x = 1;
 
+		pdata->max_frame_len = SZ_16K - 1;
+		pdata->desc_pktlen_mask = SZ_16K - 1;
+
 		if (!pdata->fifo_cfg1)
 			pdata->fifo_cfg1 = 0x0010ffff;
 		if (!pdata->fifo_cfg2)
-- 
2.11.0