netdev - Re: [Intel-wired-lan] [PATCH] e1000e: continue to init phy even when failed to disable ULP

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Date:   Tue, 16 Jun 2020 18:31:27 +0800
From:   Aaron Ma <aaron.ma@...onical.com>
To:     Paul Menzel <pmenzel@...gen.mpg.de>, jeffrey.t.kirsher@...el.com,
        davem@...emloft.net, kuba@...nel.org,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, vitaly.lifshits@...el.com,
        kai.heng.feng@...onical.com, sasha.neftin@...el.com
Subject: Re: [Intel-wired-lan] [PATCH] e1000e: continue to init phy even when
 failed to disable ULP

On 6/16/20 6:20 PM, Paul Menzel wrote:
> Dear Aaron,
> 
> 
> Thank you for your patch.
> 
> (Rant: Some more fallout from the other patch, which nobody reverted.)
> 

Would you like a revert?

Thanks,
Aaron

> Am 16.06.20 um 12:05 schrieb Aaron Ma:
>> After commit "e1000e: disable s0ix entry and exit flows for ME systems",
>> some ThinkPads always failed to disable ulp by ME.
> 
> Please add the (short) commit hash from the master branch.
> 
> s/ulp/ULP/
> 
> Please list one ThinkPad as example.
> 
>> commit "e1000e: Warn if disabling ULP failed" break out of init phy:
> 
> 1.  Please add the closing quote ".
> 2.  Please add the commit hash.
> 
>> 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.
>>
>> Chnage e_warn to e_dbg, in case it confuses.
> 
> s/Chnage/Change/
> 
> Please leave the level warning, and improve the warning message instead, so a user knows what is going on.
> 
> Could you please add a `Fixes:` tag and the URL to the bug report?
> 
>> Signed-off-by: Aaron Ma <aaron.ma@...onical.com>
>> ---
>>   drivers/net/ethernet/intel/e1000e/ich8lan.c | 3 +--
>>   1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
>> index f999cca37a8a..63405819eb83 100644
>> --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
>> +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
>> @@ -302,8 +302,7 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw)
>>       hw->dev_spec.ich8lan.ulp_state = e1000_ulp_state_unknown;
>>       ret_val = e1000_disable_ulp_lpt_lp(hw, true);
>>       if (ret_val) {
>> -        e_warn("Failed to disable ULP\n");
>> -        goto out;
>> +        e_dbg("Failed to disable ULP\n");
>>       }
>>         ret_val = hw->phy.ops.acquire(hw);
>>
> 
> Kind regards,
> 
> Paul