Re: [PATCH] net: usb: lan78xx: add weak dependency with micrel phy module

[Andrew Lunn <andrew@lunn.ch>]

On Wed, Jul 24, 2024 at 12:23:44PM +0200, Jose Ignacio Tornos Martinez wrote:
> The related module for the phy is loaded dynamically depending on the
> current hardware. In order to keep this behavior and have the phy modules
> available from initramfs, add a 'weak' dependency with the phy modules to
> allow user tools, like dracut, get this information.
> 
> Include micrel phy module because it is the hardware that I have. Other
> possible phy modules can be added later.
> 
> Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
> ---
>  drivers/net/usb/lan78xx.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
> index 8adf77e3557e..c3945aebf94e 100644
> --- a/drivers/net/usb/lan78xx.c
> +++ b/drivers/net/usb/lan78xx.c
> @@ -5074,3 +5074,4 @@ module_usb_driver(lan78xx_driver);
>  MODULE_AUTHOR(DRIVER_AUTHOR);
>  MODULE_DESCRIPTION(DRIVER_DESC);
>  MODULE_LICENSE("GPL");
> +MODULE_WEAKDEP("micrel");

~/linux$ grep -r MODULE_WEAKDEP *
~/linux$ 

Is MODULE_WEAKDEP new?

It seems like a "Wack a Mole" solution, which is not going to
scale. Does dracut not have a set of configuration files indicating
what modules should be included, using wildcards? If you want to have
NFS root, you need all the network drivers, and so you need all the
PHY drivers?

    Andrew