linux-kernel - Re: [RFC 2/3] module: Ignore delete

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Message-ID: <20170928090234.GB12599@kroah.com>
Date:   Thu, 28 Sep 2017 11:02:34 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Jon Derrick <jonathan.derrick@...el.com>
Cc:     Bjorn Helgaas <helgaas@...nel.org>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Arjan van de Ven <arjan@...ux.intel.com>,
        Alan Cox <alan@...ux.intel.com>,
        Dan J Williams <dan.j.williams@...el.com>
Subject: Re: [RFC 2/3] module: Ignore delete_id parameter

On Wed, Sep 27, 2017 at 04:40:21PM -0400, Jon Derrick wrote:
> The PCI driver delete_id parameter is handled in each individual driver
> registration callback.
> 
> Signed-off-by: Jon Derrick <jonathan.derrick@...el.com>
> ---
>  kernel/module.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/kernel/module.c b/kernel/module.c
> index de66ec8..2b2dccf 100644
> --- a/kernel/module.c
> +++ b/kernel/module.c
> @@ -3620,6 +3620,13 @@ static int unknown_module_param_cb(char *param, char *val, const char *modname,
>  		return 0;
>  	}
>  
> +	/*
> +	 * Ignore driver delete list arguments. They are handled by driver
> +	 * registration callbacks
> +	 */
> +	if (strcmp(param, "delete_id") == 0)
> +		return 0;

Why?  This is only for the PCI core as you have defined it in this
patchset, but you just broke this module id for all other kernel modules
in the system :(

If you want to do this, you need to provide this feature for _all_
kernel drivers...

thanks,

greg k-h