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

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Message-ID: <CANiq72mjc5t4n25SQvYSrOEhxxpXYPZ4pPzneSJHEnc3qApu2Q@mail.gmail.com>
Date: Tue, 26 Mar 2024 19:04:33 +0100
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Rob Clark <robdclark@...il.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>, 
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: 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: drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:843:6: error: variable
 'out' set but not used

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.

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);
     }