igb: add code to retry a phy read in the event of failure on link check
This patch adds a retry to phy reads in the event of failure. The original code broke out of the loop on failure and this is a mistake as we should be trying to do the read twice. 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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@ -1444,8 +1444,14 @@ s32 igb_phy_has_link(struct e1000_hw *hw, u32 iterations,
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* it across the board.
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*/
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ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
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if (ret_val)
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break;
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if (ret_val) {
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/*
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* If the first read fails, another entity may have
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* ownership of the resources, wait and try again to
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* see if they have relinquished the resources yet.
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*/
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udelay(usec_interval);
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}
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ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
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if (ret_val)
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break;
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