From: Jonathan Marek Date: Thu, 13 May 2021 17:14:00 +0000 (-0400) Subject: drm/msm/a6xx: avoid shadow NULL reference in failure path X-Git-Tag: microblaze-v5.15~266^2~2^2~1 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=ce86c239e4d218ae6040bec18e6d19a58edb8b7c;p=linux-2.6-microblaze.git drm/msm/a6xx: avoid shadow NULL reference in failure path 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: e8b0b994c3a5 ("drm/msm/a6xx: Clear shadow on suspend") Signed-off-by: Jonathan Marek Reviewed-by: Akhil P Oommen Link: https://lore.kernel.org/r/20210513171431.18632-6-jonathan@marek.ca Signed-off-by: Rob Clark --- diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index 37ba111601cd..f6c1b62b901e 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -1284,7 +1284,7 @@ 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;