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Subject[PATCH 06/15] drm/panfrost: properly handle error in probe
Date
Introduce a boolean to know if opp table has been added.

With this, we can call panfrost_devfreq_fini() in case of error
and release what has been initialised.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 25 ++++++++++++++++-----
drivers/gpu/drm/panfrost/panfrost_devfreq.h | 1 +
2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 78753cfb59fb..d9007f44b772 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -101,6 +101,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
return 0;
else if (ret)
return ret;
+ pfdevfreq->opp_of_table_added = true;

spin_lock_init(&pfdevfreq->lock);

@@ -109,8 +110,10 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
cur_freq = clk_get_rate(pfdev->clock);

opp = devfreq_recommended_opp(dev, &cur_freq, 0);
- if (IS_ERR(opp))
- return PTR_ERR(opp);
+ if (IS_ERR(opp)) {
+ ret = PTR_ERR(opp);
+ goto err_fini;
+ }

panfrost_devfreq_profile.initial_freq = cur_freq;
dev_pm_opp_put(opp);
@@ -119,8 +122,8 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
DEVFREQ_GOV_SIMPLE_ONDEMAND, NULL);
if (IS_ERR(devfreq)) {
DRM_DEV_ERROR(dev, "Couldn't initialize GPU devfreq\n");
- dev_pm_opp_of_remove_table(dev);
- return PTR_ERR(devfreq);
+ ret = PTR_ERR(devfreq);
+ goto err_fini;
}
pfdevfreq->devfreq = devfreq;

@@ -131,15 +134,25 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
pfdevfreq->cooling = cooling;

return 0;
+
+err_fini:
+ panfrost_devfreq_fini(pfdev);
+ return ret;
}

void panfrost_devfreq_fini(struct panfrost_device *pfdev)
{
struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;

- if (pfdevfreq->cooling)
+ if (pfdevfreq->cooling) {
devfreq_cooling_unregister(pfdevfreq->cooling);
- dev_pm_opp_of_remove_table(&pfdev->pdev->dev);
+ pfdevfreq->cooling = NULL;
+ }
+
+ if (pfdevfreq->opp_of_table_added) {
+ dev_pm_opp_of_remove_table(&pfdev->pdev->dev);
+ pfdevfreq->opp_of_table_added = false;
+ }
}

void panfrost_devfreq_resume(struct panfrost_device *pfdev)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.h b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
index e6629900a618..add203cb00c2 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
@@ -15,6 +15,7 @@ struct panfrost_device;
struct panfrost_devfreq {
struct devfreq *devfreq;
struct thermal_cooling_device *cooling;
+ bool opp_of_table_added;

ktime_t busy_time;
ktime_t idle_time;
--
2.20.1
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