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igb: Workaround for igb i210 firmware issue

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[ Upstream commit 4e684f59d7 ]

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: Chris J Arges <christopherarges@gmail.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chris J Arges
2017-03-17 00:48:19 +00:00
committed by Greg Kroah-Hartman
parent 4b40611a9b
commit 15ffc931ee
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/intel/igb/e1000_phy.c
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@@ -77,6 +77,10 @@ s32 igb_get_phy_id(struct e1000_hw *hw)
s32 ret_val = 0; s32 ret_val = 0;
u16 phy_id; 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); ret_val = phy->ops.read_reg(hw, PHY_ID1, &phy_id);
if (ret_val) if (ret_val)
goto out; goto out;