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igb: do not force retry count to 1 on 82580 phy

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This change resolves an issue seen in some configurations where the link
may drop to 100Mb/s even though the link itself supports 1000Mb/s.  The
issue was root caused to the fact that we were only trying the link once.
Now instead we will try up to 5 attempts on a faulty cable before
downshifting to 100Mb/s.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2009-12-23 13:21:07 +00:00 committed by David S. Miller
parent d68caec645
commit 8c6af2995c
1 changed files with 0 additions and 9 deletions
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9
drivers/net/igb/e1000_phy.c
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@ -457,15 +457,6 @@ s32 igb_copper_link_setup_82580(struct e1000_hw *hw)
phy_data |= I82580_CFG_ENABLE_DOWNSHIFT;
ret_val = phy->ops.write_reg(hw, I82580_CFG_REG, phy_data);
if (ret_val)
goto out;
/* Set number of link attempts before downshift */
ret_val = phy->ops.read_reg(hw, I82580_CTRL_REG, &phy_data);
if (ret_val)
goto out;
phy_data &= ~I82580_CTRL_DOWNSHIFT_MASK;
ret_val = phy->ops.write_reg(hw, I82580_CTRL_REG, phy_data);
out:
return ret_val;