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drm/msm/gpu: Fix crash on devices without devfreq support (v2) 

Avoid going down devfreq paths on devices where devfreq is not
initialized.

v2: Change has_devfreq() logic [Dmitry]

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Reported-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Fixes: 6aa89ae1fb ("drm/msm/gpu: Cancel idle/boost work on suspend")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220308184844.1121029-1-robdclark@gmail.com
This commit is contained in:
Rob Clark 2022-03-08 10:48:44 -08:00
parent aaa743d838
commit 05afd57f4d
1 changed files with 25 additions and 5 deletions
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30
drivers/gpu/drm/msm/msm_gpu_devfreq.c
View File

@ -83,6 +83,12 @@ static struct devfreq_dev_profile msm_devfreq_profile = {
static void msm_devfreq_boost_work(struct kthread_work *work);
static void msm_devfreq_idle_work(struct kthread_work *work);
static bool has_devfreq(struct msm_gpu *gpu)
{
struct msm_gpu_devfreq *df = &gpu->devfreq;
return !!df->devfreq;
}
void msm_devfreq_init(struct msm_gpu *gpu)
{
struct msm_gpu_devfreq *df = &gpu->devfreq;
@ -149,6 +155,9 @@ void msm_devfreq_cleanup(struct msm_gpu *gpu)
{
struct msm_gpu_devfreq *df = &gpu->devfreq;
if (!has_devfreq(gpu))
return;
devfreq_cooling_unregister(gpu->cooling);
dev_pm_qos_remove_request(&df->boost_freq);
dev_pm_qos_remove_request(&df->idle_freq);
@ -156,16 +165,24 @@ void msm_devfreq_cleanup(struct msm_gpu *gpu)
void msm_devfreq_resume(struct msm_gpu *gpu)
{
gpu->devfreq.busy_cycles = 0;
gpu->devfreq.time = ktime_get();
struct msm_gpu_devfreq *df = &gpu->devfreq;
devfreq_resume_device(gpu->devfreq.devfreq);
if (!has_devfreq(gpu))
return;
df->busy_cycles = 0;
df->time = ktime_get();
devfreq_resume_device(df->devfreq);
}
void msm_devfreq_suspend(struct msm_gpu *gpu)
{
struct msm_gpu_devfreq *df = &gpu->devfreq;
if (!has_devfreq(gpu))
return;
devfreq_suspend_device(df->devfreq);
cancel_idle_work(df);
@ -185,6 +202,9 @@ void msm_devfreq_boost(struct msm_gpu *gpu, unsigned factor)
struct msm_gpu_devfreq *df = &gpu->devfreq;
uint64_t freq;
if (!has_devfreq(gpu))
return;
freq = get_freq(gpu);
freq *= factor;
@ -207,7 +227,7 @@ void msm_devfreq_active(struct msm_gpu *gpu)
struct devfreq_dev_status status;
unsigned int idle_time;
if (!df->devfreq)
if (!has_devfreq(gpu))
return;
/*
@ -253,7 +273,7 @@ void msm_devfreq_idle(struct msm_gpu *gpu)
{
struct msm_gpu_devfreq *df = &gpu->devfreq;
if (!df->devfreq)
if (!has_devfreq(gpu))
return;
msm_hrtimer_queue_work(&df->idle_work, ms_to_ktime(1),