[PATCH 1/2] drm/msm/devfreq: Add some locking asserts

[Rob Clark]

From: Rob Clark <robdcl...@chromium.org>

Signed-off-by: Rob Clark <robdcl...@chromium.org>
---
 drivers/gpu/drm/msm/msm_gpu_devfreq.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_gpu_devfreq.c 
b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
index 47b3cf2df230..b24e5475cafb 100644
--- a/drivers/gpu/drm/msm/msm_gpu_devfreq.c
+++ b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
@@ -20,6 +20,8 @@ static int msm_devfreq_target(struct device *dev, unsigned 
long *freq,
        struct msm_gpu *gpu = dev_to_gpu(dev);
        struct dev_pm_opp *opp;
 
+       WARN_ON(!mutex_is_locked(&gpu->devfreq.devfreq->lock));
+
        opp = devfreq_recommended_opp(dev, freq, flags);
 
        /*
@@ -63,6 +65,8 @@ static int msm_devfreq_get_dev_status(struct device *dev,
        struct msm_gpu *gpu = dev_to_gpu(dev);
        ktime_t time;
 
+       WARN_ON(!mutex_is_locked(&gpu->devfreq.devfreq->lock));
+
        status->current_frequency = get_freq(gpu);
        status->busy_time = gpu->funcs->gpu_busy(gpu);
 
@@ -75,7 +79,11 @@ static int msm_devfreq_get_dev_status(struct device *dev,
 
 static int msm_devfreq_get_cur_freq(struct device *dev, unsigned long *freq)
 {
-       *freq = get_freq(dev_to_gpu(dev));
+       struct msm_gpu *gpu = dev_to_gpu(dev);
+
+       WARN_ON(!mutex_is_locked(&gpu->devfreq.devfreq->lock));
+
+       *freq = get_freq(gpu);
 
        return 0;
 }
-- 
2.31.1