Re: [PATCH 29/30] drm/amd/amdgpu/atombios_encoders: Remove set but unused variable 'backlight_level'

[Alex Deucher]

On Thu, Nov 12, 2020 at 2:01 PM Lee Jones <lee.jones@xxxxxxxxxx> 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@xxxxxxx>
> Cc: "Christian König" <christian.koenig@xxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> Cc: Luben Tuikov <luben.tuikov@xxxxxxx>
> Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
> ---
>  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.

Alex

>
>         dig = amdgpu_encoder->enc_priv;
>         dig->bl_dev = bd;
> --
> 2.25.1
>
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