linux-kernel - [PATCH v2 2/9] media: ov6650: Fix control handler not freed on init error

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Message-Id: <20190520225007.2308-3-jmkrzyszt@gmail.com>
Date:   Tue, 21 May 2019 00:50:00 +0200
From:   Janusz Krzysztofik <jmkrzyszt@...il.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Janusz Krzysztofik <jmkrzyszt@...il.com>,
        stable@...r.kernel.org
Subject: [PATCH v2 2/9] media: ov6650: Fix control handler not freed on init error

Since commit afd9690c72c3 ("[media] ov6650: convert to the control
framework"), if an error occurs during initialization of a control
handler, resources possibly allocated to the handler are not freed
before device initialiaton is aborted.  Fix it.

Fixes: afd9690c72c3 ("[media] ov6650: convert to the control framework")
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@...il.com>
Cc: stable@...r.kernel.org
---
 drivers/media/i2c/ov6650.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/ov6650.c b/drivers/media/i2c/ov6650.c
index a3d00afcb0c8..007f0ca24913 100644
--- a/drivers/media/i2c/ov6650.c
+++ b/drivers/media/i2c/ov6650.c
@@ -992,8 +992,10 @@ static int ov6650_probe(struct i2c_client *client,
 			V4L2_CID_GAMMA, 0, 0xff, 1, 0x12);
 
 	priv->subdev.ctrl_handler = &priv->hdl;
-	if (priv->hdl.error)
-		return priv->hdl.error;
+	if (priv->hdl.error) {
+		ret = priv->hdl.error;
+		goto ectlhdlfree;
+	}
 
 	v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true);
 	v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true);
@@ -1012,8 +1014,10 @@ static int ov6650_probe(struct i2c_client *client,
 	priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 
 	ret = v4l2_async_register_subdev(&priv->subdev);
-	if (ret)
-		v4l2_ctrl_handler_free(&priv->hdl);
+	if (!ret)
+		return 0;
+ectlhdlfree:
+	v4l2_ctrl_handler_free(&priv->hdl);
 
 	return ret;
 }
-- 
2.21.0