From: Michal Schmidt <mschmidt@redhat.com>
Date: Fri, 3 Sep 2010 16:43:28 -0400
Subject: [net] bnx2x: fix link problem with some DACs
Message-id: <20100903164328.25415.60278.stgit@brian.englab.brq.redhat.com>
Patchwork-id: 28103
O-Subject: [RHEL5.6 BZ572012 PATCH 28/46] bnx2x: Fix link problem with some DACs
Bugzilla: 572012
RH-Acked-by: David S. Miller <davem@redhat.com>
RH-Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>

From: Yaniv Rosner <yanivr@broadcom.com>

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>
(cherry picked from commit 1ab6c163dee279559e3a62d774af7e4c4c9b4c67)

diff --git a/drivers/net/bnx2x_link.c b/drivers/net/bnx2x_link.c
index ff70be8..0383e30 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 &