linux-kernel - Re: [PATCH] thermal: exynos: fix register read in TMU

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Message-ID: <20151008142129.GC10587@sudip-pc>
Date:	Thu, 8 Oct 2015 19:51:29 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Lukasz Majewski <l.majewski@...sung.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>,
	Kukjin Kim <kgene@...nel.org>, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] thermal: exynos: fix register read in TMU

On Fri, Oct 02, 2015 at 08:43:52AM +0900, Krzysztof Kozlowski wrote:
> 2015-10-01 23:12 GMT+09:00 Sudip Mukherjee <sudipm.mukherjee@...il.com>:
> > On Thu, Oct 01, 2015 at 10:18:57PM +0900, Krzysztof Kozlowski wrote:
> >> 2015-10-01 20:39 GMT+09:00 Sudip Mukherjee <sudipm.mukherjee@...il.com>:
> >> > The value of emul_con was getting overwritten if the selected soc is
> >> > SOC_ARCH_EXYNOS5260. And so as a result we were reading from the wrong
> >> > register in the case of SOC_ARCH_EXYNOS5260.
> >>
> >> How the value is overwritten if the soc is Exynos5260? I can't see it
> >> (although the "else if" is still more obvious than "if" but how does
> >> the description match the code?).
> > The code here is:
> > if (data->soc == SOC_ARCH_EXYNOS5260)
> >         emul_con = EXYNOS5260_EMUL_CON;
> > if (data->soc == SOC_ARCH_EXYNOS5433)
> >         emul_con = EXYNOS5433_TMU_EMUL_CON;
> > else if (data->soc == SOC_ARCH_EXYNOS7)
> >         emul_con = EXYNOS7_TMU_REG_EMUL_CON;
> > else
> >         emul_con = EXYNOS_EMUL_CON;
> >
> > So if data->soc is SOC_ARCH_EXYNOS5260 , then emul_con becomes
> > EXYNOS5260_EMUL_CON. But again for the else part it will become
> > EXYNOS_EMUL_CON.
> 
> Indeed!
> 
> Fixes: 488c7455d74c ("thermal: exynos: Add the support for Exynos5433 TMU")
> 
> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>

Hi Krzysztof,
Who will pick this one up? I still do not see it in linux-next.

regards
sudip
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