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Commit 4e684f59 authored by Chris J Arges's avatar Chris J Arges Committed by Jeff Kirsher
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igb: Workaround for igb i210 firmware issue 



Sometimes firmware may not properly initialize I347AT4_PAGE_SELECT causing
the probe of an igb i210 NIC to fail. This patch adds an addition zeroing
of this register during igb_get_phy_id to workaround this issue.

Thanks for Jochen Henneberg for the idea and original patch.

Signed-off-by: default avatarChris J Arges <christopherarges@gmail.com>
Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent c4f9b6e5

drivers/net/ethernet/intel/igb/e1000_phy.c

+4 −0
Original line number Diff line number Diff line
@@ -77,6 +77,10 @@ s32 igb_get_phy_id(struct e1000_hw *hw) 
	s32 ret_val = 0;

	u16 phy_id;



	/* ensure PHY page selection to fix misconfigured i210 */

	if (hw->mac.type == e1000_i210)

		phy->ops.write_reg(hw, I347AT4_PAGE_SELECT, 0);



	ret_val = phy->ops.read_reg(hw, PHY_ID1, &phy_id);

	if (ret_val)

		goto out;