linux-kernel - [PATCH v2 5/8] [media] tvp514x: Check v4l2_of_parse

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Date:	Mon, 11 Jan 2016 13:47:13 -0300
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Javier Martinez Canillas <javier@....samsung.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	"Prabhakar\"" <prabhakar.csengg@...il.com>,
	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Hans Verkuil <hans.verkuil@...co.com>,
	linux-media@...r.kernel.org
Subject: [PATCH v2 5/8] [media] tvp514x: Check v4l2_of_parse_endpoint() return value

The v4l2_of_parse_endpoint() function can fail so check the return value.

Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@...ux.intel.com>

---

Changes in v2:
- Assign pdata to NULL in case v4l2_of_parse_endpoint() fails before kzalloc.
  Suggested by Sakari Ailus.

 drivers/media/i2c/tvp514x.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/tvp514x.c b/drivers/media/i2c/tvp514x.c
index 7fa5f1e4fe37..7cdd94842938 100644
--- a/drivers/media/i2c/tvp514x.c
+++ b/drivers/media/i2c/tvp514x.c
@@ -1001,7 +1001,7 @@ static struct tvp514x_decoder tvp514x_dev = {
 static struct tvp514x_platform_data *
 tvp514x_get_pdata(struct i2c_client *client)
 {
-	struct tvp514x_platform_data *pdata;
+	struct tvp514x_platform_data *pdata = NULL;
 	struct v4l2_of_endpoint bus_cfg;
 	struct device_node *endpoint;
 	unsigned int flags;
@@ -1013,11 +1013,13 @@ tvp514x_get_pdata(struct i2c_client *client)
 	if (!endpoint)
 		return NULL;
 
+	if (v4l2_of_parse_endpoint(endpoint, &bus_cfg))
+		goto done;
+
 	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
 		goto done;
 
-	v4l2_of_parse_endpoint(endpoint, &bus_cfg);
 	flags = bus_cfg.bus.parallel.flags;
 
 	if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
-- 
2.4.3