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igb: reset PHY after recovering from PHY power down 

According to 82576_Datasheet.pdf, PHY setting is lost after PHY power down.
So resetting PHY is needed when recovering from PHY power down to set a default
setting to PHY register.
Owing to this lack, NIC doesn't link up in some rare situation.

Signed-off-by: Koki Sanagi <sanagi.koki@jp.fujitsu.com>
Tested-by: Aaron Brown <aaron.f.brown@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:
Koki Sanagi 2012-01-04 20:23:38 +00:00 committed by David S. Miller
parent 749ab2cd12
commit a95a07445e
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/intel/igb/igb_main.c
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@ -1507,6 +1507,7 @@ void igb_power_up_link(struct igb_adapter *adapter)
igb_power_up_phy_copper(&adapter->hw); igb_power_up_phy_copper(&adapter->hw);
else else
igb_power_up_serdes_link_82575(&adapter->hw); igb_power_up_serdes_link_82575(&adapter->hw);
igb_reset_phy(&adapter->hw);
} }
/** /**