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authorChris J Arges <christopherarges@gmail.com>2016-11-02 09:13:42 -0500
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2017-01-06 02:18:50 -0800
commit4e684f59d760a2c7c716bb60190783546e2d08a1 (patch)
tree62574dc4065a1f7c63fb6d01ad5b0547ab0a1e96 /drivers/net/ethernet/intel/igb/e1000_phy.c
parentigb: correct register comments (diff)
downloadlinux-dev-4e684f59d760a2c7c716bb60190783546e2d08a1.tar.xz
linux-dev-4e684f59d760a2c7c716bb60190783546e2d08a1.zip
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: 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>
Diffstat (limited to 'drivers/net/ethernet/intel/igb/e1000_phy.c')
-rw-r--r--drivers/net/ethernet/intel/igb/e1000_phy.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igb/e1000_phy.c b/drivers/net/ethernet/intel/igb/e1000_phy.c
index 5b54254aed4f..569ee25642b4 100644
--- 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;