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drm/lima: fix reference leak in lima_pm_busy

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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 dd8088d5a8 ("PM: runtime: Add  pm_runtime_resume_and_get to deal with usage counter")

Fixes: 50de2e9ebb ("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
This commit is contained in:
Qinglang Miao 2020-11-27 17:44:38 +08:00 committed by Qiang Yu
parent a6a1f036c7
commit de499781c9
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/lima/lima_sched.c
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@ -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;