netdev - Re: [PATCH net-next 2/2] net: phylink: warn if deprecated array-style fixed-link binding is used

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Message-ID: <233db109-6666-4696-9199-2da040974714@gmail.com>
Date: Thu, 11 Sep 2025 18:58:28 +0200
From: Heiner Kallweit <hkallweit1@...il.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Krzysztof Kozlowski <krzk@...nel.org>,
 Russell King - ARM Linux <linux@...linux.org.uk>,
 Andrew Lunn <andrew+netdev@...n.ch>, Paolo Abeni <pabeni@...hat.com>,
 Jakub Kicinski <kuba@...nel.org>, Eric Dumazet <edumazet@...gle.com>,
 David Miller <davem@...emloft.net>,
 "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 2/2] net: phylink: warn if deprecated array-style
 fixed-link binding is used

On 9/11/2025 6:44 PM, Andrew Lunn wrote:
> On Thu, Sep 11, 2025 at 06:28:03PM +0200, Heiner Kallweit wrote:
>> On 9/11/2025 8:34 AM, Krzysztof Kozlowski wrote:
>>> On 09/09/2025 21:16, Heiner Kallweit wrote:
>>>> The array-style fixed-link binding has been marked deprecated for more
>>>> than 10 yrs, but still there's a number of users. Print a warning when
>>>> usage of the deprecated binding is detected.
>>>>
>>>> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
>>>> ---
>>>>  drivers/net/phy/phylink.c | 3 +++
>>>>  1 file changed, 3 insertions(+)
>>>>
>>>> diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
>>>> index c7f867b36..d3cb52717 100644
>>>> --- a/drivers/net/phy/phylink.c
>>>> +++ b/drivers/net/phy/phylink.c
>>>> @@ -700,6 +700,9 @@ static int phylink_parse_fixedlink(struct phylink *pl,
>>>>  			return -EINVAL;
>>>>  		}
>>>>  
>>>> +		phylink_warn(pl, "%s uses deprecated array-style fixed-link binding!",
>>>> +			     fwnode_get_name(fwnode));
>>> Similar comment as for patch #1 - this seems to be going to printk, so
>>> use proper % format for fwnodes (I think there is as well such).
>>>
>> At least here no format for fwnodes is mentioned.
>> https://www.kernel.org/doc/Documentation/printk-formats.txt
> 
> I could be reading it wrong, but:
> 
> https://elixir.bootlin.com/linux/v6.16.6/source/lib/vsprintf.c#L2432
> https://elixir.bootlin.com/linux/v6.16.6/source/lib/vsprintf.c#L2522
> 
Ah, good. fwnode support was added more than 5 yrs ago, so documentation
seems to be very outdated.

> 	Andrew

Heiner