netdev - [PATCH net-next v2] igb: reset PHY after recovering from PHY power down

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Date:	Mon, 19 Dec 2011 10:24:24 +0900
From:	Koki Sanagi <sanagi.koki@...fujitsu.com>
To:	netdev@...r.kernel.org
CC:	davem@...emloft.net, e1000-devel@...ts.sourceforge.net,
	carolyn.wyborny@...el.com, jeffrey.t.kirsher@...el.com,
	jesse.brandeburg@...el.com, bruce.w.allan@...el.com,
	donald.c.skidmore@...el.com, gregory.v.rose@...el.com,
	peter.p.waskiewicz.jr@...el.com, alexander.h.duyck@...el.com,
	john.ronciak@...el.com
Subject: [PATCH net-next v2] 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@...fujitsu.com>
---
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 89d576c..9b923b0 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -1498,6 +1498,7 @@ void igb_power_up_link(struct igb_adapter *adapter)
 		igb_power_up_phy_copper(&adapter->hw);
 	else
 		igb_power_up_serdes_link_82575(&adapter->hw);
+	igb_reset_phy(&adapter->hw);
 }
 
 /**

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