[PATCH v3 0/2] media: qcom: iris: fix runtime PM reference handling

[PATCH v3 0/2] media: qcom: iris: fix runtime PM reference handling

[Hungyu Lin]

This series fixes runtime PM handling in the iris driver.

Patch 1 fixes runtime PM reference leaks and balances runtime PM
usage counts in the power domain enable/disable paths.

Patch 2 complements the first patch by rolling back the OPP vote
when pm_runtime_resume_and_get() fails in
iris_enable_power_domains().

Changes since v2:
- Convert the runtime PM fixes into a 2-patch series.
- Add a follow-up fix to roll back the OPP vote on
  pm_runtime_resume_and_get() failure.

Hungyu Lin (2):
  media: qcom: iris: fix runtime PM reference leaks
  media: qcom: iris: rollback OPP vote on PM resume failure

 drivers/media/platform/qcom/iris/iris_resources.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

-- 
2.34.1

[PATCH v3 1/2] media: qcom: iris: fix runtime PM reference leaks

[Hungyu Lin]

Use pm_runtime_resume_and_get() in iris_enable_power_domains()
to avoid leaking a runtime PM usage count on failure.

Also ensure pm_runtime_put_sync() is always called in
iris_disable_power_domains(), even when iris_opp_set_rate()
fails, so runtime PM references remain balanced.

Fixes: bb8a95aa038e ("media: iris: implement power management")
Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
---
 drivers/media/platform/qcom/iris/iris_resources.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/qcom/iris/iris_resources.c b/drivers/media/platform/qcom/iris/iris_resources.c
index 773f6548370a..f5e3341e1430 100644
--- a/drivers/media/platform/qcom/iris/iris_resources.c
+++ b/drivers/media/platform/qcom/iris/iris_resources.c
@@ -78,11 +78,11 @@ int iris_enable_power_domains(struct iris_core *core, struct device *pd_dev)
 	if (ret)
 		return ret;
 
-	ret = pm_runtime_get_sync(pd_dev);
-	if (ret < 0)
+	ret = pm_runtime_resume_and_get(pd_dev);
+	if (ret)
 		return ret;
 
-	return ret;
+	return 0;
 }
 
 int iris_disable_power_domains(struct iris_core *core, struct device *pd_dev)
@@ -90,12 +90,10 @@ int iris_disable_power_domains(struct iris_core *core, struct device *pd_dev)
 	int ret;
 
 	ret = iris_opp_set_rate(core->dev, 0);
-	if (ret)
-		return ret;
 
 	pm_runtime_put_sync(pd_dev);
 
-	return 0;
+	return ret;
 }
 
 static struct clk *iris_get_clk_by_type(struct iris_core *core, enum platform_clk_type clk_type)
-- 
2.34.1

Re: [PATCH v3 1/2] media: qcom: iris: fix runtime PM reference leaks

[Dmitry Baryshkov]

On Thu, Jun 04, 2026 at 09:00:58AM +0000, Hungyu Lin wrote:
> Use pm_runtime_resume_and_get() in iris_enable_power_domains()
> to avoid leaking a runtime PM usage count on failure.
> 
> Also ensure pm_runtime_put_sync() is always called in
> iris_disable_power_domains(), even when iris_opp_set_rate()
> fails, so runtime PM references remain balanced.
> 
> Fixes: bb8a95aa038e ("media: iris: implement power management")
> Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
> ---
>  drivers/media/platform/qcom/iris/iris_resources.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 

Please take a look at Sashiko comments and fix those issues.

For the patch itself:

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>


-- 
With best wishes
Dmitry

[PATCH v3 2/2] media: qcom: iris: rollback OPP vote on PM resume failure

[Hungyu Lin]

Rollback the maximum OPP vote when
pm_runtime_resume_and_get() fails in
iris_enable_power_domains().

This ensures the performance state vote is released when
power domain enablement does not complete successfully.

Fixes: bb8a95aa038e ("media: iris: implement power management")
Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
---
 drivers/media/platform/qcom/iris/iris_resources.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/iris/iris_resources.c b/drivers/media/platform/qcom/iris/iris_resources.c
index f5e3341e1430..a7d25f7a201a 100644
--- a/drivers/media/platform/qcom/iris/iris_resources.c
+++ b/drivers/media/platform/qcom/iris/iris_resources.c
@@ -79,8 +79,10 @@ int iris_enable_power_domains(struct iris_core *core, struct device *pd_dev)
 		return ret;
 
 	ret = pm_runtime_resume_and_get(pd_dev);
-	if (ret)
+	if (ret) {
+		iris_opp_set_rate(core->dev, 0);
 		return ret;
+	}
 
 	return 0;
 }
-- 
2.34.1

Re: [PATCH v3 2/2] media: qcom: iris: rollback OPP vote on PM resume failure

[Dmitry Baryshkov]

On Thu, Jun 04, 2026 at 09:00:59AM +0000, Hungyu Lin wrote:
> Rollback the maximum OPP vote when
> pm_runtime_resume_and_get() fails in
> iris_enable_power_domains().
> 
> This ensures the performance state vote is released when
> power domain enablement does not complete successfully.
> 
> Fixes: bb8a95aa038e ("media: iris: implement power management")
> Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
> ---
>  drivers/media/platform/qcom/iris/iris_resources.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Please implement standard rollback code, using goto's.

> 
> diff --git a/drivers/media/platform/qcom/iris/iris_resources.c b/drivers/media/platform/qcom/iris/iris_resources.c
> index f5e3341e1430..a7d25f7a201a 100644
> --- a/drivers/media/platform/qcom/iris/iris_resources.c
> +++ b/drivers/media/platform/qcom/iris/iris_resources.c
> @@ -79,8 +79,10 @@ int iris_enable_power_domains(struct iris_core *core, struct device *pd_dev)
>  		return ret;
>  
>  	ret = pm_runtime_resume_and_get(pd_dev);
> -	if (ret)
> +	if (ret) {
> +		iris_opp_set_rate(core->dev, 0);
>  		return ret;
> +	}
>  
>  	return 0;
>  }
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry