[v3][PATCH] e1000e: continue to init phy even when failed to disable ULP

From: Aaron Ma
Date: Thu Jun 18 2020 - 02:45:28 EST


After commit: e086ba2fccda4 ("e1000e: disable s0ix entry and exit flows
for ME systems").
ThinkPad P14s always failed to disable ULP by ME.
commit: 0c80cdbf3320 ("e1000e: Warn if disabling ULP failed")
break out of init phy:

error log:
[ 42.364753] e1000e 0000:00:1f.6 enp0s31f6: Failed to disable ULP
[ 42.524626] e1000e 0000:00:1f.6 enp0s31f6: PHY Wakeup cause - Unicast Packet
[ 42.822476] e1000e 0000:00:1f.6 enp0s31f6: Hardware Error

When disable s0ix, E1000_FWSM_ULP_CFG_DONE will never be 1.
If continue to init phy like before, it can work as before.
iperf test result good too.

Fixes: 0c80cdbf3320 ("e1000e: Warn if disabling ULP failed")
Signed-off-by: Aaron Ma <aaron.ma@xxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/e1000e/ich8lan.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index f999cca37a8a..be7475c5529d 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -303,7 +303,6 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw)
ret_val = e1000_disable_ulp_lpt_lp(hw, true);
if (ret_val) {
e_warn("Failed to disable ULP\n");
- goto out;
}

ret_val = hw->phy.ops.acquire(hw);
--
2.26.2