linux-kernel - Re: [PATCH 00/13] leds: fix attribute-creation races

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Date:	Thu, 26 Jun 2014 19:25:06 -0400
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Bryan Wu <cooloney@...il.com>
Cc:	Johan Hovold <johan@...nel.org>,
	Richard Purdie <rpurdie@...ys.net>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
	Linux LED Subsystem <linux-leds@...r.kernel.org>,
	Janne Kanniainen <janne.kanniainen@...il.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Bjørn Mork <bjorn@...k.no>
Subject: Re: [PATCH 00/13] leds: fix attribute-creation races

On Wed, Jun 25, 2014 at 03:46:19PM -0700, Bryan Wu wrote:
> On Wed, Jun 25, 2014 at 10:08 AM, Johan Hovold <johan@...nel.org> wrote:
> > LED-class device attributes should be created using the attribute groups
> > of struct device, rather than be added manually after the device has
> > been registered in order to avoid racing with userspace.
> >
> > The first patch adds an attribute groups field to struct led_classdev,
> > which is used during registration to add device attributes in a
> > race-free manner.
> >
> > The remaining patches convert the current racy LED-device attribute
> > creations to use the new facility. Hopefully my grep-patterns have
> > caught most instances. Note that this also tends to simplify probe error
> > paths.
> >
> > The lp55xx-common failed to remove the attribute group it is currently
> > creating, something which is fixed separately.
> >
> > Note that this series include one driver from drivers/input/keyboard.
> >
> > The individual led-driver patches have been compile tested only.
> >
> 
> Thanks a lot for driving this. I will applied this patchset into my
> -devel branch. After I got the Ack from Input guys, I will apply it to
> my for-next branch then.

Series looks good to me, Johan, thanks for doing this work.

greg k-h
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