linux-kernel - Re: [PATCH v2] gpio: sysfs: fix gpio device-attribute leak

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Date:	Wed, 28 Jan 2015 09:42:22 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Johan Hovold <johan@...nel.org>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	linux-kernel@...r.kernel.org,
	Luis Henriques <luis.henriques@...onical.com>,
	stable <stable@...r.kernel.org>
Subject: Re: [PATCH v2] gpio: sysfs: fix gpio device-attribute leak

On Wed, Jan 28, 2015 at 05:05:05PM +0100, Johan Hovold wrote:
> commit 0915e6feb38de8d3601819992a5bd050201a56fa upstream.
> 
> The gpio device attributes were never destroyed when the gpio was
> unexported (or on export failures).
> 
> Use device_create_with_groups() to create the default device attributes
> of the gpio class device. Note that this also fixes the
> attribute-creation race with userspace for these attributes.
> 
> Remove contingent attributes in export error path and on unexport.
> 
> Fixes: d8f388d8dc8d ("gpio: sysfs interface")
> Cc: stable <stable@...r.kernel.org> # v2.6.27+
> Signed-off-by: Johan Hovold <johan@...nel.org>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> 
> Backport to v3.10 (and earlier) which lacks device_create_with_groups().
> 
> Changes since v1
>  - fix mistake in backport, which removed the attributes while holding
>    the mutex in gpiod_unexport (reported by Luis Henriques)

Thanks for the updated patch, now replaced the old one with this one.

greg k-h
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