linux-kernel - Re: [PATCH] USB: expose Huawei E1550 3G modem

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Date:	Mon, 19 Apr 2010 09:17:05 -0700
From:	Greg KH <greg@...ah.com>
To:	Stefan Assmann <sassmann@...hat.com>, digidietze@...isberghof.de,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH] USB: expose Huawei E1550 3G modem

On Mon, Apr 19, 2010 at 09:14:06AM -0700, Matthew Dharm wrote:
> On Mon, Apr 19, 2010 at 04:58:55PM +0200, Stefan Assmann wrote:
> > On 19.04.2010 16:19, Matthew Dharm wrote:
> > > 
> > > 2) It is much much easier to update a userspace tool than the kernel.
> > > Thus, new devices can be supported without a kernel update by end-users.
> > 
> > Of course. Nobody is talking about removing existing code from any
> > user-space application. Under the condition that no functionality gets
> > lost, wouldn't it be convenient to have the modem exposed by the kernel?
> > If the kernel support doesn't suffice you can still run an updated
> > usb_modeswitch until kernel support is there.
> > 
> > This also has the benefit that it would work for people that don't
> > have usb_modeswitch installed. Matt, are you still thinking that is the
> > wrong way of doing it?
> 
> I still believe that, for an end-user, upgrading a userspace tool is much
> much easier than upgrading a kernel.
> 
> Also, the actual "driver" for the device (i.e. the modem part) doesn't need
> an upgrade to the kernel component for these types of devices.
> 
> Finally, these sorts of databases don't belong in the kernel as much as
> possible.
> 
> The usb-storage driver will not accept patches for device which can be
> supported via userspace-only tools.

And just to confirm, I support Matthew's position.

thanks,

greg k-h
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