This is a note to let you know that I've just added the patch titled
drm/lima: fix reference leak in lima_pm_busy
to the 5.11-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-lima-fix-reference-leak-in-lima_pm_busy.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 12936e86fff0246bcd8509becc8eca77a6ea5e79
Author: Qinglang Miao <miaoqinglang@xxxxxxxxxx>
Date: Fri Nov 27 17:44:38 2020 +0800
drm/lima: fix reference leak in lima_pm_busy
[ Upstream commit de4248b744e8394f239c0dd0af34088399d27d94 ]
pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to putting operation will result in a
reference leak here.
A new function pm_runtime_resume_and_get is introduced in
[0] to keep usage counter balanced. So We fix the reference
leak by replacing it with new function.
[0] commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
Fixes: 50de2e9ebbc0 ("drm/lima: enable runtime pm")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Qinglang Miao <miaoqinglang@xxxxxxxxxx>
Signed-off-by: Qiang Yu <yuq825@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20201127094438.121003-1-miaoqinglang@xxxxxxxxxx
(cherry picked from commit de499781c97d96703af8a32d2b5e37fdb5b51568)
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
index 63b4c5643f9cd..5cc20b403a252 100644
--- a/drivers/gpu/drm/lima/lima_sched.c
+++ b/drivers/gpu/drm/lima/lima_sched.c
@@ -201,7 +201,7 @@ static int lima_pm_busy(struct lima_device *ldev)
int ret;
/* resume GPU if it has been suspended by runtime PM */
- ret = pm_runtime_get_sync(ldev->dev);
+ ret = pm_runtime_resume_and_get(ldev->dev);
if (ret < 0)
return ret;
