| From foo@baz Mon Mar 20 11:41:01 CET 2017 |
| From: alexander.levin@verizon.com |
| Date: Fri, 17 Mar 2017 00:48:19 +0000 |
| Subject: igb: Workaround for igb i210 firmware issue |
| To: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org> |
| Cc: "stable@vger.kernel.org" <stable@vger.kernel.org> |
| Message-ID: <20170317004812.26960-2-alexander.levin@verizon.com> |
| |
| From: Chris J Arges <christopherarges@gmail.com> |
| |
| [ Upstream commit 4e684f59d760a2c7c716bb60190783546e2d08a1 ] |
| |
| 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> |
| --- |
| drivers/net/ethernet/intel/igb/e1000_phy.c | 4 ++++ |
| 1 file changed, 4 insertions(+) |
| |
| --- a/drivers/net/ethernet/intel/igb/e1000_phy.c |
| +++ b/drivers/net/ethernet/intel/igb/e1000_phy.c |
| @@ -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; |
