igb: do not force retry count to 1 on 82580 phy
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>
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@ -457,15 +457,6 @@ s32 igb_copper_link_setup_82580(struct e1000_hw *hw)
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phy_data |= I82580_CFG_ENABLE_DOWNSHIFT;
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ret_val = phy->ops.write_reg(hw, I82580_CFG_REG, phy_data);
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if (ret_val)
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goto out;
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/* Set number of link attempts before downshift */
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ret_val = phy->ops.read_reg(hw, I82580_CTRL_REG, &phy_data);
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if (ret_val)
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goto out;
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phy_data &= ~I82580_CTRL_DOWNSHIFT_MASK;
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ret_val = phy->ops.write_reg(hw, I82580_CTRL_REG, phy_data);
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out:
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return ret_val;
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