linux-kernel - Re: drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:843:6: error: variable 'out' set but not used

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Date: Tue, 26 Mar 2024 11:31:38 -0700
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Miguel Ojeda
	<miguel.ojeda.sandonis@...il.com>
CC: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn
 Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        linux-arm-msm
	<linux-arm-msm@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>,
        linux-kernel
	<linux-kernel@...r.kernel.org>
Subject: Re: drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:843:6: error:
 variable 'out' set but not used



On 3/26/2024 11:19 AM, Dmitry Baryshkov wrote:
> On Tue, 26 Mar 2024 at 20:05, Miguel Ojeda
> <miguel.ojeda.sandonis@...il.com> wrote:
>>
>> Hi,
>>
>> In today's next, I got:
>>
>>      drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:843:6: error: variable
>> 'out' set but not used [-Werror,-Wunused-but-set-variable]
>>
>> `out` seems to be there since commit 64d6255650d4 ("drm/msm: More
>> fully implement devcoredump for a7xx").
>>
>> Untested diff below assuming `dumper->iova` is constant -- if you want
>> a formal patch, please let me know.
> 
> Please send a proper patch that we can pick up.
> 

This should be fixed with https://patchwork.freedesktop.org/patch/581853/.

We can pickup that one with a Fixes tag applied.

>>
>> Cheers,
>> Miguel
>>
>> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
>> b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
>> index 1f5245fc2cdc..a847a0f7a73c 100644
>> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
>> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
>> @@ -852,7 +852,7 @@ static void a6xx_get_shader_block(struct msm_gpu *gpu,
>>               (block->type << 8) | i);
>>
>>           in += CRASHDUMP_READ(in, REG_A6XX_HLSQ_DBG_AHB_READ_APERTURE,
>> -            block->size, dumper->iova + A6XX_CD_DATA_OFFSET);
>> +            block->size, out);
>>
>>           out += block->size * sizeof(u32);
>>       }
> 
> 
>