linux-kernel - Re: linux-4.11-rc1/drivers/gpu/drm/exynos/exynos5433_drm_decon.c:681: suspicious mask ?

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Date:   Thu, 09 Mar 2017 09:29:40 +0100
From:   Andrzej Hajda <a.hajda@...sung.com>
To:     Inki Dae <inki.dae@...sung.com>,
        David Binderman <dcb314@...mail.com>,
        "jy0922.shim@...sung.com" <jy0922.shim@...sung.com>,
        "sw0312.kim@...sung.com" <sw0312.kim@...sung.com>,
        "kyungmin.park@...sung.com" <kyungmin.park@...sung.com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "kgene@...nel.org" <kgene@...nel.org>,
        "krzk@...nel.org" <krzk@...nel.org>,
        "javier@....samsung.com" <javier@....samsung.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: linux-4.11-rc1/drivers/gpu/drm/exynos/exynos5433_drm_decon.c:681:
 suspicious mask ?

On 09.03.2017 08:34, Inki Dae wrote:
> Hello David,
>
> Thanks for report.
>
> 2017년 03월 06일 19:05에 David Binderman 이(가) 쓴 글:
>> Hello there,
>>
>> linux-4.11-rc1/drivers/gpu/drm/exynos/exynos5433_drm_decon.c:681]: (warning) Result of operator '|' is always true if one operand is non-zero. Did you intend to use '&'?
>>
> Right. this is known issue and below patch fixes this,
> http://www.spinics.net/lists/dri-devel/msg132589.html
>
> This patch will go to -fixes.
>
>> Source code is
>>
>>     if (ctx->out_type | I80_HW_TRG) {
>>
>> Also in the same file:
>>
>> [drivers/gpu/drm/exynos/exynos5433_drm_decon.c:131]: (style) Same expression on both sides of '|'.
>>
>> Source code is
>>
>>        writel(TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN
>>                | TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN,
> In this case, only problem is two flags are set in duplicate. This should be cleaned up. Thanks. :)

Wrong copy/paste removed two other flags and duplicated these above. It
did not hurt to much as it affects only software trigger which is not
used atm.
Fix sent yesterday [1].

[1]: http://www.spinics.net/lists/dri-devel/msg134877.html

Regards
Andrzej

>
>> Regards
>>
>> David Binderman
>>
>>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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