linux-kernel - Re: [PATCH net v1 1/1] net: usb: asix: ax88772: Increase phy

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Message-ID: <481268aa-c8e9-4475-bd5c-8d0f82a6652a@lunn.ch>
Date: Tue, 18 Mar 2025 17:49:05 +0100
From: Andrew Lunn <andrew@...n.ch>
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>
Subject: Re: [PATCH net v1 1/1] net: usb: asix: ax88772: Increase phy_name
 size

>  struct ax88172a_private {
>  	struct mii_bus *mdio;
>  	struct phy_device *phydev;
> -	char phy_name[20];
> +	char phy_name[MII_BUS_ID_SIZE + 5];

Could you explain the + 5?

https://elixir.bootlin.com/linux/v6.13.7/source/drivers/net/ethernet/davicom/dm9051.c#L1156
https://elixir.bootlin.com/linux/v6.13.7/source/drivers/net/ethernet/freescale/fec_main.c#L2454
https://elixir.bootlin.com/linux/v6.13.7/source/drivers/net/ethernet/xilinx/ll_temac.h#L348

The consensus seems to be + 3.

	Andrew