This is a note to let you know that I've just added the patch titled
drm/nouveau/dispnv50: fix runtime pm imbalance on error
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-nouveau-dispnv50-fix-runtime-pm-imbalance-on-err.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e1b517ac0fe665fae1f3f2f4f57c8dc3d6cb3251
Author: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Date: Wed May 20 18:47:48 2020 +0800
drm/nouveau/dispnv50: fix runtime pm imbalance on error
[ Upstream commit dc455f4c888365595c0a13da445e092422d55b8d ]
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@xxxxxxxxxx>
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index e06ea8c8184cb..1bb0a9f6fa730 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -909,8 +909,10 @@ nv50_mstc_detect(struct drm_connector *connector, bool force)
return connector_status_disconnected;
ret = pm_runtime_get_sync(connector->dev->dev);
- if (ret < 0 && ret != -EACCES)
+ if (ret < 0 && ret != -EACCES) {
+ pm_runtime_put_autosuspend(connector->dev->dev);
return connector_status_disconnected;
+ }
conn_status = drm_dp_mst_detect_port(connector, mstc->port->mgr,
mstc->port);
