linux-kernel - Re: [PATCH] usb: add new usb gadget for ACM and mass storage

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Date:	Fri, 9 Sep 2011 11:43:54 -0700
From:	Greg KH <gregkh@...e.de>
To:	Michal Nazarewicz <mina86@...a86.com>
Cc:	Klaus Schwarzkopf <schwarzkopf@...sortherm.de>, balbi@...com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: add new usb gadget for ACM and mass storage

On Fri, Sep 09, 2011 at 12:20:53PM +0200, Michal Nazarewicz wrote:
> >On Thu, Sep 08, 2011 at 08:24:47PM +0200, Klaus Schwarzkopf wrote:
> >>This driver provides two functions in one configuration:
> >>a mass storage, and a CDC ACM (serial port) link.
> >>Heavily based on multi.c and cdc2.c
> 
> On Thu, 08 Sep 2011 21:11:46 +0200, Greg KH <gregkh@...e.de> wrote:
> >I thought the "composite" framework make it so that drivers like this
> >were no longer needed.  Or am I mistaken somehow?
> 
> No.  Composite framework only makes it relatively simple to create such
> gadgets, but one still needs some glue that binds all the functions into
> a single gadget.

Ah, so this is that glue?

> This seems like both a blessing and a curse (which I haven't realise when
> I was creating g_multi) since with n functions implemented one can easily
> came up with 2^n gadgets.

So we can expect more patches like this adding all of the possible
permutations of the different gadget devices?

If so, ick, I thought that the work that was done was to prevent this
from happening, oh well :(

greg k-h
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