netdev - Re: [PATCH net-next] r8169: remove not needed PHY soft reset in rtl8168e_2_hw_phy

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Date:   Wed, 21 Feb 2018 13:16:51 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     hkallweit1@...il.com
Cc:     nic_swsd@...ltek.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] r8169: remove not needed PHY soft reset in
 rtl8168e_2_hw_phy_config

From: Heiner Kallweit <hkallweit1@...il.com>
Date: Wed, 21 Feb 2018 07:29:24 +0100

> Am 21.02.2018 um 05:27 schrieb David Miller:
>> From: Heiner Kallweit <hkallweit1@...il.com>
>> Date: Tue, 20 Feb 2018 07:30:16 +0100
>> 
>>> rtl8169_init_phy() resets the PHY anyway after applying the chip-specific
>>> PHY configuration. So we don't need to soft-reset the PHY as part of the
>>> chip-specific configuration.
>>>
>>> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
>> 
>> I'm not so comfortable with this.
>> 
>> There are so many r8169 chip variants out there.
>> 
>> And who knows, maybe one of them needs this second PHY reset or due to
>> some way the driver is coded it is necessary.
>> 
>> Unless you can test this change on every r8169 chip type, I'm very
>> reluctant to apply this patch.
>> 
> I understand the concern, the change however is in rtl8168e_2_hw_phy_config()
> which is specific to chip version 34 (RTL8168evl).
> On my system with this chip version the change didn't change system behavior.

Ok, that does alleviate my concerns.

Patch applied, thank you.