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Re: ipw2100: firmware problem

To: James Ketrenos <jketreno@xxxxxxxxxxxxxxx>
Subject: Re: ipw2100: firmware problem
From: Pavel Machek <pavel@xxxxxx>
Date: Wed, 8 Jun 2005 23:27:07 +0200
Cc: Jeff Garzik <jgarzik@xxxxxxxxx>, Netdev list <netdev@xxxxxxxxxxx>, kernel list <linux-kernel@xxxxxxxxxxxxxxx>, "James P. Ketrenos" <ipw2100-admin@xxxxxxxxxxxxxxx>
In-reply-to: <42A723D3.3060001@xxxxxxxxxxxxxxx>
References: <20050608142310.GA2339@xxxxxxxxxx> <42A723D3.3060001@xxxxxxxxxxxxxxx>
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> >I'm fighting with firmware problem: if ipw2100 is compiled into
> >kernel, it is loaded while kernel boots and firmware loader is not yet
> >available. That leads to uninitialized (=> useless) adapter.
> >  
> >
> We've been looking into whether the initrd can have the firmware affixed
> to the end w/ some magic bytes to identify it.  If it works, enhancing
> the request_firmware to support both hotplug and an initrd approach may
> be reasonable.

That seems pretty ugly to me... imagine more than one driver does this

> >What's the prefered way to solve this one? Only load firmware when
> >user does ifconfig eth1 up? [It is wifi, it looks like it would be
> >better to start firmware sooner so that it can associate to the
> >AP...].
> >  
> >
> The debate goes back and forth on whether devices should come up only
> after they are told, or initialize and start looking for a network as
> soon as the module is loaded.
> I lean more toward having the driver just do what it is told, defaulting
> to trying to scan and associate so link is ready as soon as possible. 
> We've added module parameters to change that behavior (disable and
> associate for the ipw2100).

Having a parameter to control this seems a bit too complex to me.

How is 

insmod ipw2100 enable=1

different from

insmod ipw2100
iwconfig eth1 start_scanning_or_whatever



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