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-miaoqi... (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(-)
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;