openwrt-xburst/target/linux/x86/patches-3.2/902-8139cp_config_rx_mode.patch

From f872b237c1750221932e715da2552225afe4a95c Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Fri, 30 Dec 2011 23:44:42 +0000
Subject: [PATCH] 8139cp: properly config rx mode after resuming

Rx mode should be reset after resming, so unconditionally updating rx
mode rather than conditionally updating based on the value we
remembered, otherwise unexpected value may be used by the nic after
resuming.

btw. I find and test this when debugging guest hibernation in qemu, as
I did not have a 8139cp card in hand, this patch is untested in a
physical 8139cp card, plase review it carefully.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/realtek/8139cp.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/realtek/8139cp.c
+++ b/drivers/net/ethernet/realtek/8139cp.c
@@ -860,7 +860,6 @@ static void __cp_set_rx_mode (struct net
 	struct cp_private *cp = netdev_priv(dev);
 	u32 mc_filter[2];	/* Multicast hash filter */
 	int rx_mode;
-	u32 tmp;
 
 	/* Note: do not reorder, GCC is clever about common statements. */
 	if (dev->flags & IFF_PROMISC) {
@@ -887,11 +886,9 @@ static void __cp_set_rx_mode (struct net
 	}
 
 	/* We can safely update without stopping the chip. */
-	tmp = cp_rx_config | rx_mode;
-	if (cp->rx_config != tmp) {
-		cpw32_f (RxConfig, tmp);
-		cp->rx_config = tmp;
-	}
+	cp->rx_config = cp_rx_config | rx_mode;
+	cpw32_f(RxConfig, cp->rx_config);
+
 	cpw32_f (MAR0 + 0, mc_filter[0]);
 	cpw32_f (MAR0 + 4, mc_filter[1]);
 }