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* [PATCH] drm/v3d: fix runtime pm imbalance on error
@ 2020-05-20 12:07 Dinghao Liu
  0 siblings, 0 replies; only message in thread
From: Dinghao Liu @ 2020-05-20 12:07 UTC (permalink / raw)
  To: dinghao.liu, kjlu; +Cc: David Airlie, dri-devel, linux-kernel

pm_runtime_get_sync() increments the runtime PM usage counter even
the call returns an error code. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/gpu/drm/v3d/v3d_gem.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 549dde83408b..d53c683ed74c 100644
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -440,8 +440,10 @@ v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
 	job->free = free;
 
 	ret = pm_runtime_get_sync(v3d->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_autosuspend(v3d->dev);
 		return ret;
+	}
 
 	xa_init_flags(&job->deps, XA_FLAGS_ALLOC);
 
-- 
2.17.1

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2020-05-20 12:07 [PATCH] drm/v3d: fix runtime pm imbalance on error Dinghao Liu

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