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igb: add code to retry a phy read in the event of failure on link check

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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>
This commit is contained in:
Alexander Duyck 2009-10-05 06:35:23 +00:00 committed by David S. Miller
parent 81fadd81a5
commit ab576389b7
1 changed files with 8 additions and 2 deletions
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10
drivers/net/igb/e1000_phy.c
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@ -1444,8 +1444,14 @@ s32 igb_phy_has_link(struct e1000_hw *hw, u32 iterations,
* it across the board.
*/
ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
if (ret_val)
break;
if (ret_val) {
/*
* If the first read fails, another entity may have
* ownership of the resources, wait and try again to
* see if they have relinquished the resources yet.
*/
udelay(usec_interval);
}
ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
if (ret_val)
break;