From: Akhil P Oommen quic_akhilpo@quicinc.com
[ Upstream commit 76efc2453d0e8e5d6692ef69981b183ad674edea ]
In adreno_unbind, we should clean up gpu device's drvdata to avoid accessing a stale pointer during system suspend. Also, check for NULL ptr in both system suspend/resume callbacks.
Signed-off-by: Akhil P Oommen quic_akhilpo@quicinc.com Patchwork: https://patchwork.freedesktop.org/patch/505075/ Link: https://lore.kernel.org/r/20220928124830.2.I5ee0ac073ccdeb81961e5ec0cce5f741... Signed-off-by: Rob Clark robdclark@chromium.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/msm/adreno/adreno_device.c | 10 +++++++++- drivers/gpu/drm/msm/msm_gpu.c | 2 ++ drivers/gpu/drm/msm/msm_gpu.h | 4 ++++ 3 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c index 24b489b6129a..628806423f7d 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_device.c +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c @@ -679,6 +679,9 @@ static int adreno_system_suspend(struct device *dev) struct msm_gpu *gpu = dev_to_gpu(dev); int remaining, ret;
+ if (!gpu) + return 0; + suspend_scheduler(gpu);
remaining = wait_event_timeout(gpu->retire_event, @@ -700,7 +703,12 @@ static int adreno_system_suspend(struct device *dev)
static int adreno_system_resume(struct device *dev) { - resume_scheduler(dev_to_gpu(dev)); + struct msm_gpu *gpu = dev_to_gpu(dev); + + if (!gpu) + return 0; + + resume_scheduler(gpu); return pm_runtime_force_resume(dev); }
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index c2bfcf3f1f40..01aae792ffa9 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -993,4 +993,6 @@ void msm_gpu_cleanup(struct msm_gpu *gpu) }
msm_devfreq_cleanup(gpu); + + platform_set_drvdata(gpu->pdev, NULL); } diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index 4d935fedd2ac..fd22cf4041af 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -282,6 +282,10 @@ struct msm_gpu { static inline struct msm_gpu *dev_to_gpu(struct device *dev) { struct adreno_smmu_priv *adreno_smmu = dev_get_drvdata(dev); + + if (!adreno_smmu) + return NULL; + return container_of(adreno_smmu, struct msm_gpu, adreno_smmu); }