From 0031b9011cb2b2b1de4dbb4f9620303aec760db4 Mon Sep 17 00:00:00 2001
From: Alexey Brodkin <abrodkin@synopsys.com>
Date: Wed, 27 Jul 2016 11:33:14 +0300
Subject: [PATCH] stmmac: Disable frame filtering completely

For some [still unknown] reason in ARC SDP boards
DW GMAC doesn't enter promiscuous mode if eth0 gets
added to the br-lan interface before Ethernet PHY finishes
autonegotiation (PHY gets reset on DW GMAC start).

As a work-around we completely disable frame filtering
in GMAC hardware which gives us working bridge that consists
of eth0 and wlan0 (USB Wi-Fi dongle). I.e. we finally have
working "Dumb AP" setup made of ARC AXS10x boards.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 drivers/net/ethernet/stmicro/stmmac/common.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -42,7 +42,7 @@
 #define	DWMAC_CORE_3_50	0x35
 
 #undef FRAME_FILTER_DEBUG
-/* #define FRAME_FILTER_DEBUG */
+#define FRAME_FILTER_DEBUG
 
 /* Extra statistic and debug information exposed by ethtool */
 struct stmmac_extra_stats {
