linux-kernel - Re: [PATCH net v3 1/2] net: phy: Introduce PHY_ID_SIZE

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Message-ID: <Z-F07j7tlez_94aK@shell.armlinux.org.uk>
Date: Mon, 24 Mar 2025 15:06:22 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: linux-usb@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH net v3 1/2] net: phy: Introduce PHY_ID_SIZE — minimum size for
 PHY ID string

On Mon, Mar 24, 2025 at 04:39:29PM +0200, Andy Shevchenko wrote:
> The PHY_ID_FMT defines the format specifier "%s:%02x" to form
> the PHY ID string, where the maximum of the first part is defined
> in MII_BUS_ID_SIZE, including NUL terminator, and the second part
> is implied to be 3 as the maximum address is limited to 32, meaning
> that 2 hex digits is more than enough, plus ':' (colon) delimiter.
> However, some drivers, which are using PHY_ID_FMT, customise buffer
> size and do that incorrectly. Introduce a new constant PHY_ID_SIZE
> that makes the minimum required size explicit, so drivers are
> encouraged to use it.
> 
> Suggested-by: "Russell King (Oracle)" <linux@...linux.org.uk>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>

Thanks!

-- 
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