linux-kernel - Re: [PATCH] usb: udc: add gadget state kobject uevent

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Message-ID: <20130717075706.GC5291@arwen.pp.htv.fi>
Date:	Wed, 17 Jul 2013 10:57:06 +0300
From:	Felipe Balbi <balbi@...com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	Rong Wang <wr011235813@...il.com>, <balbi@...com>,
	Arnd Bergmann <arnd@...db.de>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <Rong.Wang@....com>
Subject: Re: [PATCH] usb: udc: add gadget state kobject uevent

Hi,

On Mon, Jul 15, 2013 at 11:31:17PM -0700, Greg KH wrote:
> > The question is since we default GADGET, so the g_mass_storage.ko is
> > installed early but connecting to a host PC
> > is randomly, But the udev has no idea when a host PC connects our device.
> > 
> > So we consider it's reasonable to let the udev know the GADGET device state.
> > Is there any alternative to our question?
> 
> I thought we already export events for gadget device states, have you
> looked for them?  I can't dig through the code at the moment, but this
> seems like a pretty common issue...
> 
> Felipe, any ideas?

we already expose that in sysfs. IIRC udev can act on sysfs changes,
no ?

-- 
balbi

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