e1000e: remove unnecessary 82577 workaround causing link issues

A workaround for pre-release versions of 82577 is causing link issues on
some switches.  The workaround is no longer needed on production parts so
remove it.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/e1000e/phy.c b/drivers/net/e1000e/phy.c
index 8189d00..85f955f 100644 (file)
--- a/drivers/net/e1000e/phy.c
+++ b/drivers/net/e1000e/phy.c
@@ -71,7 +71,6 @@ static const u16 e1000_igp_2_cable_length_table[] =
 #define I82577_CFG_ASSERT_CRS_ON_TX       (1 << 15)
 #define I82577_CFG_ENABLE_DOWNSHIFT       (3 << 10) /* auto downshift 100/10 */
 #define I82577_CTRL_REG                   23
-#define I82577_CTRL_DOWNSHIFT_MASK        (7 << 10)
 
 /* 82577 specific PHY registers */
 #define I82577_PHY_CTRL_2            18
@@ -660,15 +659,6 @@ s32 e1000_copper_link_setup_82577(struct e1000_hw *hw)
        phy_data |= I82577_CFG_ENABLE_DOWNSHIFT;
 
        ret_val = phy->ops.write_phy_reg(hw, I82577_CFG_REG, phy_data);
-       if (ret_val)
-               goto out;
-
-       /* Set number of link attempts before downshift */
-       ret_val = phy->ops.read_phy_reg(hw, I82577_CTRL_REG, &phy_data);
-       if (ret_val)
-               goto out;
-       phy_data &= ~I82577_CTRL_DOWNSHIFT_MASK;
-       ret_val = phy->ops.write_phy_reg(hw, I82577_CTRL_REG, phy_data);
 
 out:
        return ret_val;