linux-kernel - Re: [PATCH 29/30] drm/amd/amdgpu/atombios_encoders: Remove set but unused variable 'backlight

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Date:   Thu, 12 Nov 2020 22:10:38 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Alex Deucher <alexdeucher@...il.com>
Cc:     David Airlie <airlied@...ux.ie>,
        LKML <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Luben Tuikov <luben.tuikov@....com>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH 29/30] drm/amd/amdgpu/atombios_encoders: Remove set but
 unused variable 'backlight_level'

On Thu, 12 Nov 2020, Alex Deucher wrote:

> On Thu, Nov 12, 2020 at 2:01 PM Lee Jones <lee.jones@...aro.org> wrote:
> >
> > Fixes the following W=1 kernel build warning(s):
> >
> >  drivers/gpu/drm/amd/amdgpu/atombios_encoders.c: In function ‘amdgpu_atombios_encoder_init_backlight’:
> >  drivers/gpu/drm/amd/amdgpu/atombios_encoders.c:174:5: warning: variable ‘backlight_level’ set but not used [-Wunused-but-set-variable]
> >
> > Cc: Alex Deucher <alexander.deucher@....com>
> > Cc: "Christian König" <christian.koenig@....com>
> > Cc: David Airlie <airlied@...ux.ie>
> > Cc: Daniel Vetter <daniel@...ll.ch>
> > Cc: Luben Tuikov <luben.tuikov@....com>
> > Cc: amd-gfx@...ts.freedesktop.org
> > Cc: dri-devel@...ts.freedesktop.org
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> > ---
> >  drivers/gpu/drm/amd/amdgpu/atombios_encoders.c | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
> > index fa817ebff9804..af87505ad7d57 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
> > @@ -171,7 +171,6 @@ void amdgpu_atombios_encoder_init_backlight(struct amdgpu_encoder *amdgpu_encode
> >         struct backlight_properties props;
> >         struct amdgpu_backlight_privdata *pdata;
> >         struct amdgpu_encoder_atom_dig *dig;
> > -       u8 backlight_level;
> >         char bl_name[16];
> >
> >         /* Mac laptops with multiple GPUs use the gmux driver for backlight
> > @@ -207,7 +206,7 @@ void amdgpu_atombios_encoder_init_backlight(struct amdgpu_encoder *amdgpu_encode
> >
> >         pdata->encoder = amdgpu_encoder;
> >
> > -       backlight_level = amdgpu_atombios_encoder_get_backlight_level_from_reg(adev);
> > +       amdgpu_atombios_encoder_get_backlight_level_from_reg(adev);
> 
> We can drop this function call altogether.  We call it again below indirectly.

Will do, thanks.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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