在 2021/5/21 12:47, Inki Dae 写道:
Hi,
21. 5. 20. 오후 10:36에 Tian Tao 이(가) 쓴 글:
use pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. it also avoids the problem of positive return
values so we can change if (ret < 0) to if (ret).
Could you tell me why did you change the condition? pm_runtime_resume_and_get() can return only 0 or negative value.
So I think you don't have to change the condition. Could you drop this description?
Signed-off-by: Tian Tao <tiantao6@xxxxxxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_drm_mic.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c b/drivers/gpu/drm/exynos/exynos_drm_mic.c
index 3821ea7..6d94eae 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
@@ -268,11 +268,9 @@ static void mic_pre_enable(struct drm_bridge *bridge)
if (mic->enabled)
goto unlock;
- ret = pm_runtime_get_sync(mic->dev);
- if (ret < 0) {
- pm_runtime_put_noidle(mic->dev);
+ ret = pm_runtime_resume_and_get(mic->dev);
Right, we can use pm_runtime_resume_and_get function because pm_runtime_resume_and_get function does exactly same thing as existing code does.
+ if (ret)
Seems unnecessary change.
as you can see，If pm_runtime_resume_and_get returns 0, it means that the
function was executed successfully and should not be executed in an if
condition.
There is no error in continuing to use if (ret < 0), but it is not as
concise as using if (ret) directly
static inline int pm_runtime_resume_and_get(struct device *dev)
{
int ret;
ret = __pm_runtime_resume(dev, RPM_GET_PUT);
if (ret < 0) {
pm_runtime_put_noidle(dev);
return ret;
}
return 0;
}
Thanks,
Inki Dae
goto unlock;
- }
mic_set_path(mic, 1);
.
