提交 8c6af299 编写于 作者: A Alexander Duyck 提交者: David S. Miller

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: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 d68caec6
......@@ -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;
......
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