linux-kernel - [PATCH 3/3] media: i2c: imx219: Balance runtime PM use-count in resume callback

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Message-Id: <20210310122014.28353-4-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date:   Wed, 10 Mar 2021 12:20:14 +0000
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Pavel Machek <pavel@...x.de>,
        Andrey Konovalov <andrey.konovalov@...aro.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: [PATCH 3/3] media: i2c: imx219: Balance runtime PM use-count in resume callback

The runtime PM use-count gets incremented in imx219_set_stream() call
when streaming is started this needs to be balanced by calling
pm_runtime_put() upon failure to start stream in resume callback.

Fixes: 1283b3b8f82b9 ("media: i2c: Add driver for Sony IMX219 sensor")
Reported-by: Pavel Machek <pavel@...x.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 drivers/media/i2c/imx219.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
index 87c021de1460..afffc85cd265 100644
--- a/drivers/media/i2c/imx219.c
+++ b/drivers/media/i2c/imx219.c
@@ -1184,6 +1184,7 @@ static int __maybe_unused imx219_resume(struct device *dev)
 {
 	struct v4l2_subdev *sd = dev_get_drvdata(dev);
 	struct imx219 *imx219 = to_imx219(sd);
+	struct i2c_client *client;
 	int ret;
 
 	mutex_lock(&imx219->mutex);
@@ -1197,7 +1198,9 @@ static int __maybe_unused imx219_resume(struct device *dev)
 	return 0;
 
 error:
+	client = v4l2_get_subdevdata(&imx219->sd);
 	imx219_stop_streaming(imx219);
+	pm_runtime_put(&client->dev);
 	imx219->streaming = false;
 	__v4l2_ctrl_grab(imx219->vflip, false);
 	__v4l2_ctrl_grab(imx219->hflip, false);
-- 
2.17.1