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[5.10,235/663] drm/lima: fix reference leak in lima_pm_busy

Message ID 20210301161153.442328349@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman March 1, 2021, 4:08 p.m. UTC 
From: Qinglang Miao <miaoqinglang@huawei.com>

[ 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@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201127094438.121003-1-miaoqinglang@huawei.com
(cherry picked from commit de499781c97d96703af8a32d2b5e37fdb5b51568)
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/lima/lima_sched.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
index dc6df9e9a40d8..f6e7a88a56f1b 100644
--- a/drivers/gpu/drm/lima/lima_sched.c
+++ b/drivers/gpu/drm/lima/lima_sched.c
@@ -200,7 +200,7 @@  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;