Commit 6446e0ba authored by Chris J Arges's avatar Chris J Arges Committed by Greg Kroah-Hartman

igb: Workaround for igb i210 firmware issue

commit 4e684f59 upstream.

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>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d1fad823
......@@ -83,6 +83,10 @@ 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;
......
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