linux-kernel - Re: [PATCH 3.19.y-ckt 084/164] thermal: exynos: Fix unbalanced regulator disable on probe failure

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Date:	Thu, 10 Dec 2015 08:26:36 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com, k.kozlowski.k@...il.com,
	Eduardo Valentin <edubezval@...il.com>
Subject: Re: [PATCH 3.19.y-ckt 084/164] thermal: exynos: Fix unbalanced
 regulator disable on probe failure

On Thu, 2015-12-10 at 09:49 +0900, Krzysztof Kozlowski wrote:
> On 09.12.2015 22:24, Krzysztof Kozlowski wrote:
> > W dniu 03.12.2015 o 01:58, Kamal Mostafa pisze:
> >> 3.19.8-ckt11 -stable review patch.  If anyone has any objections, please let me know.
> >>
> >> ------------------
> >>
> >> From: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> >>
> >> commit 824ead03b78403a21449cb7eb153a4344cd3b4c8 upstream.
> >>
> >> During probe if the regulator could not be enabled, the error exit path
> >> would still disable it. This could lead to unbalanced counter of
> >> regulator enable/disable.
> >>
> >> The patch moves code for getting and enabling the regulator from
> >> exynos_map_dt_data() to probe function because it is really not a part
> >> of getting Device Tree properties.
> >>
> >> Acked-by: Lukasz Majewski <l.majewski@...sung.com>
> >> Tested-by: Lukasz Majewski <l.majewski@...sung.com>
> >> Reviewed-by: Alim Akhtar <alim.akhtar@...sung.com>
> >> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> >> Fixes: 5f09a5cbd14a ("thermal: exynos: Disable the regulator on probe failure")
> >> Signed-off-by: Eduardo Valentin <edubezval@...il.com>
> >> Signed-off-by: Kamal Mostafa <kamal@...onical.com>
> >> ---
> >>  drivers/thermal/samsung/exynos_tmu.c | 33 ++++++++++++++++-----------------
> >>  1 file changed, 16 insertions(+), 17 deletions(-)
> > 
> > This patch shouldn't be backported before 4.2. It fixes a bug introduced
> > in 4.2: 5f09a5cbd14a.
> > 
> > For kernels <4.2 this bug does not exist but fortunately the patch looks
> > harmless. Anyway I think that still it shouldn't be ported for <4.2.
> > 
> > Best regards,
> > Krzysztof
> > 
> 
> Sorry for the noise, I was wrong. Luis pointed out that the 5f09a5cbd14a
> was itself backported to 3.19 so this applies to backporting as well.

No worries.  Thanks for reviewing this, Krzysztof.

 -Kamal

> No objections from my side.
> 
> Best regards,
> Krzysztof
> 


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