forcedeth: multicast fix

This patch fixes the case where no multicast addresses are requested to
be added to the multicast filter. The multicast mask must be set to all
1's instead of all 0's.
Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/forcedeth.c

@@ -277,7 +277,9 @@ enum {
 #define NVREG_MCASTADDRA_FORCE	0x01
 	NvRegMulticastAddrB = 0xB4,
 	NvRegMulticastMaskA = 0xB8,
+#define NVREG_MCASTMASKA_NONE		0xffffffff
 	NvRegMulticastMaskB = 0xBC,
+#define NVREG_MCASTMASKB_NONE		0xffff
 
 	NvRegPhyInterface = 0xC0,
 #define PHY_RGMII		0x10000000
@@ -2693,6 +2695,9 @@ static void nv_set_multicast(struct net_device *dev)
 			addr[1] = alwaysOn[1];
 			mask[0] = alwaysOn[0] | alwaysOff[0];
 			mask[1] = alwaysOn[1] | alwaysOff[1];
+		} else {
+			mask[0] = NVREG_MCASTMASKA_NONE;
+			mask[1] = NVREG_MCASTMASKB_NONE;
 		}
 	}
 	addr[0] |= NVREG_MCASTADDRA_FORCE;
@@ -4803,8 +4808,8 @@ static int nv_open(struct net_device *dev)
 		nv_mac_reset(dev);
 	writel(NVREG_MCASTADDRA_FORCE, base + NvRegMulticastAddrA);
 	writel(0, base + NvRegMulticastAddrB);
-	writel(0, base + NvRegMulticastMaskA);
-	writel(0, base + NvRegMulticastMaskB);
+	writel(NVREG_MCASTMASKA_NONE, base + NvRegMulticastMaskA);
+	writel(NVREG_MCASTMASKB_NONE, base + NvRegMulticastMaskB);
 	writel(0, base + NvRegPacketFilterFlags);
 
 	writel(0, base + NvRegTransmitterControl);
@@ -4898,8 +4903,8 @@ static int nv_open(struct net_device *dev)
 	spin_lock_irq(&np->lock);
 	writel(NVREG_MCASTADDRA_FORCE, base + NvRegMulticastAddrA);
 	writel(0, base + NvRegMulticastAddrB);
-	writel(0, base + NvRegMulticastMaskA);
-	writel(0, base + NvRegMulticastMaskB);
+	writel(NVREG_MCASTMASKA_NONE, base + NvRegMulticastMaskA);
+	writel(NVREG_MCASTMASKB_NONE, base + NvRegMulticastMaskB);
 	writel(NVREG_PFF_ALWAYS|NVREG_PFF_MYADDR, base + NvRegPacketFilterFlags);
 	/* One manual link speed update: Interrupts are enabled, future link
 	 * speed changes cause interrupts and are handled by nv_link_irq().