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

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

[David Binderman]

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 '&'?

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,

Regards

David Binderman

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

[Andrzej Hajda]

Hi David, Inki,

Thanks for reporting.

On 06.03.2017 11:05, David Binderman wrote:
> 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 '&'?
>
> 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,

This typo was already reported by:
- Ilia Mirkin, I have uploaded 2nd fixed version of the patch,
apparently the 1st version has been merged [1],
- Dan Carpenter, he posted also the fix[2],
- and now David.

I guess at the moment the best solution is to get Dan's patch.

[1]: https://patchwork.kernel.org/patch/9493177/
[2]: https://patchwork.kernel.org/patch/9571375/

Regards
Andrzej

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


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

[Inki Dae]

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. :)

> 
> Regards
> 
> David Binderman
> 
> 
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Re: linux-4.11-rc1/drivers/gpu/drm/exynos/exynos5433_drm_decon.c:681: suspicious mask ?

[Andrzej Hajda]

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@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel


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