bnx2x: Fix link problem with some DACs

Change 2wire transfer rate of SFP+ module EEPROM from 400Khz to 100Khz
since some DACs(direct attached cables) do not work at 400Khz.

Reported-by: Krzysztof Oldzki <ole@ans.pl>
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>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/net/bnx2x_link.c b/drivers/net/bnx2x_link.c
index ff70be898765..0383e3066313 100644
--- a/drivers/net/bnx2x_link.c
+++ b/drivers/net/bnx2x_link.c
@@ -4266,14 +4266,16 @@ static u8 bnx2x_ext_phy_init(struct link_params *params, struct link_vars *vars)
                                                MDIO_PMA_REG_10G_CTRL2, 0x0008);
                         }
 
-                        /* Set 2-wire transfer rate to 400Khz since 100Khz
-                        is not operational */
+                        /* Set 2-wire transfer rate of SFP+ module EEPROM
+                         * to 100Khz since some DACs(direct attached cables) do
+                         * not work at 400Khz.
+                         */
                         bnx2x_cl45_write(bp, params->port,
                                        ext_phy_type,
                                        ext_phy_addr,
                                        MDIO_PMA_DEVAD,
                                        MDIO_PMA_REG_8727_TWO_WIRE_SLAVE_ADDR,
-                                       0xa101);
+                                       0xa001);
 
                         /* Set TX PreEmphasis if needed */
                         if ((params->feature_config_flags &