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From:   Wang Li <wangli74@huawei.com>
To:     <chunkuang.hu@kernel.org>, <p.zabel@pengutronix.de>,
        <airlied@linux.ie>, <daniel@ffwll.ch>, <matthias.bgg@gmail.com>
CC:     <dri-devel@lists.freedesktop.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-mediatek@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <kernel-janitors@vger.kernel.org>,
        Wang Li <wangli74@huawei.com>
Subject: [PATCH -next] drm/mediatek: Fix PM reference leak in mtk_crtc_ddp_hw_init()
Date:   Sat, 10 Apr 2021 03:48:41 +0000
Message-ID: <20210410034841.16567-1-wangli74@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Li <wangli74@huawei.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 54ab3a324752..f1954242d8f6 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -259,7 +259,7 @@ static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
 		drm_connector_list_iter_end(&conn_iter);
 	}
 
-	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;
-- 
2.17.1