From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thierry Reding <thierry.reding@gmail.com>
Date: Fri, 07 Nov 2014 13:47:36 +0000
Subject: Re: [PATCH 2/2] backlight: pwm: clean up pwm requested using legacy API
Message-Id: <20141107134735.GA31950@ulmo>
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List-Id: <linux-fbdev.vger.kernel.org>
References: <1413035186-11771-1-git-send-email-vladimir_zapolskiy@mentor.com>
 <1413035186-11771-3-git-send-email-vladimir_zapolskiy@mentor.com>
In-Reply-To: <1413035186-11771-3-git-send-email-vladimir_zapolskiy@mentor.com>
To: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Cc: linux-fbdev@vger.kernel.org, linux-pwm@vger.kernel.org, Jingoo Han <jg1.han@samsung.com>, Bryan Wu <cooloney@gmail.com>, Lee Jones <lee.jones@linaro.org>, stable@vger.kernel.org


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On Sat, Oct 11, 2014 at 04:46:26PM +0300, Vladimir Zapolskiy wrote:
> If PWM device is requested by means of legacy API pwm_request(), its
> resources are not freed on module unbind, which may cause an oops on
> access, e.g. by reading /sys/kernel/debug/pwm.
>=20
> Reported-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
> ---
>  drivers/video/backlight/pwm_bl.c |    4 ++++
>  1 file changed, 4 insertions(+)

Hopefully this can soon go away when all users of the legacy API have
been converted. Until then:

Acked-by: Thierry Reding <thierry.reding@gmail.com>

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