linux-kernel - Re: [PATCH] usb: gadget: nokia: Add mass storage driver to g

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Date:	Mon, 2 Feb 2015 13:14:35 -0600
From:	Felipe Balbi <balbi@...com>
To:	Pali Rohár <pali.rohar@...il.com>
CC:	<balbi@...com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Pavel Machek <pavel@....cz>,
	Sebastian Reichel <sre@...nel.org>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>
Subject: Re: [PATCH] usb: gadget: nokia: Add mass storage driver to g_nokia

On Mon, Feb 02, 2015 at 08:07:51PM +0100, Pali Rohár wrote:
> On Monday 02 February 2015 20:01:11 Felipe Balbi wrote:
> > Hi,
> > 
> > On Mon, Feb 02, 2015 at 07:58:59PM +0100, Pali Rohár wrote:
> > > On Monday 02 February 2015 19:54:58 Felipe Balbi wrote:
> > > > Hi,
> > > > 
> > > > On Sat, Jan 31, 2015 at 10:53:30AM +0100, Pali Rohár wrote:
> > > > > This patch adds removable mass storage support to
> > > > > g_nokia gadget (for N900). It means that at runtime
> > > > > block device can be exported or unexported. So it does
> > > > > not export anything by default and thus allows to use
> > > > > MyDocs partition as before...
> > > > > 
> > > > > Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> > > > 
> > > > thanks, but no thanks. Build your own using configfs.
> > > 
> > > But it needs some userspace interaction right?
> > > Then its not possible for nfsboot.
> > 
> > oh, right... you're using nfsboot through g_nokia. Hmm, sounds
> > like you need initramfs.
> 
> Also compiling usb gadgets as external .ko modules is broken.
> So I cannot use configfs, when I compile g_nokia even if I use 
> initramfs...

yeah, there are people working on that and some patches already flying
around for it. Meanwhile, you can make it built-in and use initramfs to
add mass_storage through configfs to g_nokia, no issues.

-- 
balbi

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