pm_runtime_put_autosuspend() and pm_runtime_put_sync_suspend() will decrease the rumtime PM counter even when it returns an error. Thus a pairing decrement is needed to prevent refcount leak. Fix this by adding pm_runtime_resume_and_get() on error handling path.
Signed-off-by: Yongzhi Liu lyz_cs@pku.edu.cn --- drivers/gpu/drm/panel/panel-samsung-atna33xc20.c | 4 +++- drivers/gpu/drm/panel/panel-simple.c | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c b/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c index 20666b6..dd7e3f1 100644 --- a/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c +++ b/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c @@ -189,8 +189,10 @@ static int atana33xc20_unprepare(struct drm_panel *panel) * to get the EDID or otherwise send DP AUX commands to the panel. */ ret = pm_runtime_put_sync_suspend(panel->dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_resume_and_get(panel->dev); return ret; + } p->prepared = false;
return 0; diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index 9e46db5..ad18965 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -323,8 +323,10 @@ static int panel_simple_unprepare(struct drm_panel *panel)
pm_runtime_mark_last_busy(panel->dev); ret = pm_runtime_put_autosuspend(panel->dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_resume_and_get(panel->dev); return ret; + } p->prepared = false;
return 0;