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drm/msm/a6xx: avoid shadow NULL reference in failure path 

commit ce86c239e4d218ae6040bec18e6d19a58edb8b7c upstream.

If a6xx_hw_init() fails before creating the shadow_bo, the a6xx_pm_suspend
code referencing it will crash. Change the condition to one that avoids
this problem (note: creation of shadow_bo is behind this same condition)

Fixes: e8b0b994c3 ("drm/msm/a6xx: Clear shadow on suspend")
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Akhil P Oommen <akhilpo@codeaurora.org>
Link: https://lore.kernel.org/r/20210513171431.18632-6-jonathan@marek.ca
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/374/head^2
Jonathan Marek 2021-05-13 13:14:00 -04:00 committed by Greg Kroah-Hartman
parent 0bc79f4b7a
commit fd681a8c7a
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/msm/adreno/a6xx_gpu.c
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@ -1128,7 +1128,7 @@ static int a6xx_pm_suspend(struct msm_gpu *gpu)
if (ret)
return ret;
if (adreno_gpu->base.hw_apriv || a6xx_gpu->has_whereami)
if (a6xx_gpu->shadow_bo)
for (i = 0; i < gpu->nr_rings; i++)
a6xx_gpu->shadow[i] = 0;