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drm/mediatek: fix reference leak in mtk_crtc_ddp_hw_init

Message ID 20201127094439.121049-1-miaoqinglang@huawei.com (mailing list archive)
State New, archived
Headers show
Series drm/mediatek: fix reference leak in mtk_crtc_ddp_hw_init | expand

Commit Message

Qinglang Miao Nov. 27, 2020, 9:44 a.m. UTC
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 funtion.

[0] dd8088d5a896 ("PM: runtime: Add  pm_runtime_resume_and_get to deal with usage counter")

Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series


diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index ac0385721..dfd5ed15a 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -274,7 +274,7 @@  static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
-	ret = pm_runtime_get_sync(crtc->dev->dev);
+	ret = pm_runtime_resume_and_get(crtc->dev->dev);
 	if (ret < 0) {
 		DRM_ERROR("Failed to enable power domain: %d\n", ret);
 		return ret;