bnx2x: Fix potential link issue In BCM8727 based boards

In BCM8727 based boards, setting default 10G link speed after link was
set to 1G may lead to link down issue. The problem was setting the right
value, but to the wrong registers

Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bnx2x/bnx2x_link.c

@@ -4239,8 +4239,10 @@ static u8 bnx2x_ext_phy_init(struct link_params *params, struct link_vars *vars)
 			} else if ((params->req_line_speed ==
 				    SPEED_AUTO_NEG) &&
 				   ((params->speed_cap_mask &
-				     PORT_HW_CFG_SPEED_CAPABILITY_D0_1G))) {
-
+				     PORT_HW_CFG_SPEED_CAPABILITY_D0_1G)) &&
+				   ((params->speed_cap_mask &
+				     PORT_HW_CFG_SPEED_CAPABILITY_D0_10G) !=
+				    PORT_HW_CFG_SPEED_CAPABILITY_D0_10G)) {
 				DP(NETIF_MSG_LINK, "Setting 1G clause37\n");
 				bnx2x_cl45_write(bp, params->port, ext_phy_type,
 					       ext_phy_addr, MDIO_AN_DEVAD,
@@ -4253,17 +4255,18 @@ static u8 bnx2x_ext_phy_init(struct link_params *params, struct link_vars *vars)
 				need to set the 10G registers although it is
 				default */
 				bnx2x_cl45_write(bp, params->port, ext_phy_type,
-					       ext_phy_addr, MDIO_AN_DEVAD,
-					       MDIO_AN_REG_CTRL, 0x0020);
+					      ext_phy_addr, MDIO_AN_DEVAD,
+					      MDIO_AN_REG_8727_MISC_CTRL,
+					      0x0020);
 				bnx2x_cl45_write(bp, params->port, ext_phy_type,
-					       ext_phy_addr, MDIO_AN_DEVAD,
-					       0x7, 0x0100);
+					      ext_phy_addr, MDIO_AN_DEVAD,
+					      MDIO_AN_REG_CL37_AN, 0x0100);
 				bnx2x_cl45_write(bp, params->port, ext_phy_type,
-					       ext_phy_addr, MDIO_PMA_DEVAD,
-					       MDIO_PMA_REG_CTRL, 0x2040);
+					      ext_phy_addr, MDIO_PMA_DEVAD,
+					      MDIO_PMA_REG_CTRL, 0x2040);
 				bnx2x_cl45_write(bp, params->port, ext_phy_type,
-					       ext_phy_addr, MDIO_PMA_DEVAD,
-					       MDIO_PMA_REG_10G_CTRL2, 0x0008);
+					      ext_phy_addr, MDIO_PMA_DEVAD,
+					      MDIO_PMA_REG_10G_CTRL2, 0x0008);
 			}
 
 			/* Set 2-wire transfer rate of SFP+ module EEPROM

drivers/net/bnx2x/bnx2x_reg.h

@@ -5211,6 +5211,8 @@ Theotherbitsarereservedandshouldbezero*/
 
 #define MDIO_AN_REG_8073_2_5G		0x8329
 
+#define MDIO_AN_REG_8727_MISC_CTRL	0x8309
+
 #define MDIO_AN_REG_8481_LEGACY_MII_CTRL	0xffe0
 #define MDIO_AN_REG_8481_LEGACY_AN_ADV		0xffe4
 #define MDIO_AN_REG_8481_1000T_CTRL		0xffe9