netdev - Re: [PATCH net-next] myri10ge: allow per-board firmware overriding

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Message-ID: <20090420135342.417f3ebd@dhcp-lab-109.englab.brq.redhat.com>
Date:	Mon, 20 Apr 2009 13:53:42 +0200
From:	Stanislaw Gruszka <sgruszka@...hat.com>
To:	Brice Goglin <brice@...i.com>
Cc:	David Dillow <dave@...dillows.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux Network Development list <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] myri10ge: allow per-board firmware overriding

On Mon, 20 Apr 2009 11:55:15 +0200
Brice Goglin <brice@...i.com> wrote:

> Stanislaw Gruszka wrote:
> > Providing module_param_id would address this issues, but I have some concerns
> > before doing it:
> >
> > - device have to access ID (like serial no) before initialization (at least
> >   before driver will need parameter)
> > - why nobody already done it - perhaps such thing would be totally useless
> >   
> 
> Per-nic module parameters are used in some Intel NIC drivers but it's
> not considered a very good solution in the general case:
>
> http://kerneltrap.org/index.php?q=mailarchive/linux-netdev/2008/10/24/3801824/thread
> 
> But again, when talking about changing the NIC firmware, ethtool and
> friends are not that easy.

I agree that device parameters, which are not needed during initialization
or can be changed at runtime shall not be module parameters. I agree also
that some parameters are needed during startup when driver loads and are
driver specific. For these modules parameters shall be used. Firmware is one
example, I think we have others.

Cheers
Stanislaw
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