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From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Rui Miguel Silva <rmfrfs@gmail.com>,
	Steve Longerbeam <slongerbeam@gmail.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	linux-media@vger.kernel.org, linux-staging@lists.linux.dev,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] media: imx: imx7-mipi-csis: Fix runtime PM imbalance in mipi_csis_s_stream
Date: Thu,  8 Apr 2021 17:08:27 +0800	[thread overview]
Message-ID: <20210408090827.32612-1-dinghao.liu@zju.edu.cn> (raw)

When v4l2_subdev_call() fails, a pairing PM usage counter
decrement is needed to keep the counter balanced. It's the
same for the following error paths in case 'enable' is on.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/staging/media/imx/imx7-mipi-csis.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c
index a01a7364b4b9..2a3fff231a40 100644
--- a/drivers/staging/media/imx/imx7-mipi-csis.c
+++ b/drivers/staging/media/imx/imx7-mipi-csis.c
@@ -627,21 +627,26 @@ static int mipi_csis_s_stream(struct v4l2_subdev *mipi_sd, int enable)
 			return ret;
 		}
 		ret = v4l2_subdev_call(state->src_sd, core, s_power, 1);
-		if (ret < 0)
+		if (ret < 0) {
+			pm_runtime_put_noidle(&state->pdev->dev);
 			return ret;
+		}
 	}
 
 	mutex_lock(&state->lock);
 	if (enable) {
 		if (state->flags & ST_SUSPENDED) {
 			ret = -EBUSY;
+			pm_runtime_put_noidle(&state->pdev->dev);
 			goto unlock;
 		}
 
 		mipi_csis_start_stream(state);
 		ret = v4l2_subdev_call(state->src_sd, video, s_stream, 1);
-		if (ret < 0)
+		if (ret < 0) {
+			pm_runtime_put_noidle(&state->pdev->dev);
 			goto unlock;
+		}
 
 		mipi_csis_log_counters(state, true);
 
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Rui Miguel Silva <rmfrfs@gmail.com>,
	Steve Longerbeam <slongerbeam@gmail.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	linux-media@vger.kernel.org, linux-staging@lists.linux.dev,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] media: imx: imx7-mipi-csis: Fix runtime PM imbalance in mipi_csis_s_stream
Date: Thu,  8 Apr 2021 17:08:27 +0800	[thread overview]
Message-ID: <20210408090827.32612-1-dinghao.liu@zju.edu.cn> (raw)

When v4l2_subdev_call() fails, a pairing PM usage counter
decrement is needed to keep the counter balanced. It's the
same for the following error paths in case 'enable' is on.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/staging/media/imx/imx7-mipi-csis.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c
index a01a7364b4b9..2a3fff231a40 100644
--- a/drivers/staging/media/imx/imx7-mipi-csis.c
+++ b/drivers/staging/media/imx/imx7-mipi-csis.c
@@ -627,21 +627,26 @@ static int mipi_csis_s_stream(struct v4l2_subdev *mipi_sd, int enable)
 			return ret;
 		}
 		ret = v4l2_subdev_call(state->src_sd, core, s_power, 1);
-		if (ret < 0)
+		if (ret < 0) {
+			pm_runtime_put_noidle(&state->pdev->dev);
 			return ret;
+		}
 	}
 
 	mutex_lock(&state->lock);
 	if (enable) {
 		if (state->flags & ST_SUSPENDED) {
 			ret = -EBUSY;
+			pm_runtime_put_noidle(&state->pdev->dev);
 			goto unlock;
 		}
 
 		mipi_csis_start_stream(state);
 		ret = v4l2_subdev_call(state->src_sd, video, s_stream, 1);
-		if (ret < 0)
+		if (ret < 0) {
+			pm_runtime_put_noidle(&state->pdev->dev);
 			goto unlock;
+		}
 
 		mipi_csis_log_counters(state, true);
 
-- 
2.17.1


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             reply	other threads:[~2021-04-08  9:08 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-08  9:08 Dinghao Liu [this message]
2021-04-08  9:08 ` [PATCH] media: imx: imx7-mipi-csis: Fix runtime PM imbalance in mipi_csis_s_stream Dinghao Liu
2021-04-08 13:57 ` Rui Miguel Silva
2021-04-08 13:57   ` Rui Miguel Silva
2021-04-09  7:59   ` dinghao.liu
2021-04-09  7:59     ` dinghao.liu
2021-04-09  7:59     ` dinghao.liu

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