bnx2x: treat 0 speed as link down (copper)

Signed-off-by: NYuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: NYaniv Rosner <yaniv.rosner@broadcom.com>
Signed-off-by: NEilon Greenstein <eilong@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c

@@ -10178,7 +10178,6 @@ static u8 bnx2x_848xx_read_status(struct bnx2x_phy *phy,
 		DP(NETIF_MSG_LINK, "Legacy speed status = 0x%x\n",
 		   legacy_status);
 		link_up = ((legacy_status & (1<<11)) == (1<<11));
-		if (link_up) {
 		legacy_speed = (legacy_status & (3<<9));
 		if (legacy_speed == (0<<9))
 			vars->line_speed = SPEED_10;
@@ -10186,9 +10185,12 @@ static u8 bnx2x_848xx_read_status(struct bnx2x_phy *phy,
 			vars->line_speed = SPEED_100;
 		else if (legacy_speed == (2<<9))
 			vars->line_speed = SPEED_1000;
-			else /* Should not happen */
+		else { /* Should not happen: Treat as link down */
 			vars->line_speed = 0;
+			link_up = 0;
+		}
 
+		if (link_up) {
 			if (legacy_status & (1<<8))
 				vars->duplex = DUPLEX_FULL;
 			else