linux-kernel - [PATCH] media: exynos4-is: Fix runtime PM imbalance in isp_video

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Date:   Sun, 24 May 2020 11:34:04 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Kyungmin Park <kyungmin.park@...sung.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] media: exynos4-is: Fix runtime PM imbalance in isp_video_open

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 drivers/media/platform/exynos4-is/fimc-isp-video.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/exynos4-is/fimc-isp-video.c b/drivers/media/platform/exynos4-is/fimc-isp-video.c
index 15f443fa7208..612b9872afc8 100644
--- a/drivers/media/platform/exynos4-is/fimc-isp-video.c
+++ b/drivers/media/platform/exynos4-is/fimc-isp-video.c
@@ -293,6 +293,7 @@ static int isp_video_open(struct file *file)
 	if (!ret)
 		goto unlock;
 rel_fh:
+	pm_runtime_put_noidle(&isp->pdev->dev);
 	v4l2_fh_release(file);
 unlock:
 	mutex_unlock(&isp->video_lock);
-- 
2.17.1