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;