bnx2: Advertise nothing when speed is forced

The current code does not reset the advertisement register when the speed
is forced, leaving the default advertisement value of 10 Mbps.  This does
not work with some link partners when the next patch enables auto-mdix.

Set advertisement register to 0 if the speed is forced.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2.c

@@ -2048,29 +2048,27 @@ bnx2_setup_copper_phy(struct bnx2 *bp)
 __releases(&bp->phy_lock)
 __acquires(&bp->phy_lock)
 {
-	u32 bmcr;
+	u32 bmcr, adv_reg, new_adv = 0;
 	u32 new_bmcr;
 
 	bnx2_read_phy(bp, bp->mii_bmcr, &bmcr);
 
-	if (bp->autoneg & AUTONEG_SPEED) {
-		u32 adv_reg, adv1000_reg;
-		u32 new_adv = 0;
-		u32 new_adv1000 = 0;
-
 	bnx2_read_phy(bp, bp->mii_adv, &adv_reg);
 	adv_reg &= (PHY_ALL_10_100_SPEED | ADVERTISE_PAUSE_CAP |
 		    ADVERTISE_PAUSE_ASYM);
 
-		bnx2_read_phy(bp, MII_CTRL1000, &adv1000_reg);
-		adv1000_reg &= PHY_ALL_1000_SPEED;
+	new_adv = ADVERTISE_CSMA | ethtool_adv_to_mii_adv_t(bp->advertising);
+
+	if (bp->autoneg & AUTONEG_SPEED) {
+		u32 adv1000_reg;
+		u32 new_adv1000 = 0;
 
-		new_adv = ethtool_adv_to_mii_adv_t(bp->advertising);
-		new_adv |= ADVERTISE_CSMA;
 		new_adv |= bnx2_phy_get_pause_adv(bp);
 
-		new_adv1000 |= ethtool_adv_to_mii_ctrl1000_t(bp->advertising);
+		bnx2_read_phy(bp, MII_CTRL1000, &adv1000_reg);
+		adv1000_reg &= PHY_ALL_1000_SPEED;
 
+		new_adv1000 |= ethtool_adv_to_mii_ctrl1000_t(bp->advertising);
 		if ((adv1000_reg != new_adv1000) ||
 			(adv_reg != new_adv) ||
 			((bmcr & BMCR_ANENABLE) == 0)) {
@@ -2090,6 +2088,10 @@ __acquires(&bp->phy_lock)
 		return 0;
 	}
 
+	/* advertise nothing when forcing speed */
+	if (adv_reg != new_adv)
+		bnx2_write_phy(bp, bp->mii_adv, new_adv);
+
 	new_bmcr = 0;
 	if (bp->req_line_speed == SPEED_100) {
 		new_bmcr |= BMCR_SPEED100;