media: i2c: imx214: Move controls init to separate function

Code refinement.

While at it, don't destroy the mutex not initialized yet if the controls
are initialized incorrectly.
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/i2c/imx214.c

@@ -695,6 +695,69 @@ static const struct v4l2_ctrl_ops imx214_ctrl_ops = {
 	.s_ctrl = imx214_set_ctrl,
 };
 
+static int imx214_ctrls_init(struct imx214 *imx214)
+{
+	static const s64 link_freq[] = {
+		IMX214_DEFAULT_LINK_FREQ
+	};
+	static const struct v4l2_area unit_size = {
+		.width = 1120,
+		.height = 1120,
+	};
+	struct v4l2_ctrl_handler *ctrl_hdlr;
+	int ret;
+
+	ctrl_hdlr = &imx214->ctrls;
+	ret = v4l2_ctrl_handler_init(&imx214->ctrls, 3);
+	if (ret)
+		return ret;
+
+	imx214->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, NULL,
+					       V4L2_CID_PIXEL_RATE, 0,
+					       IMX214_DEFAULT_PIXEL_RATE, 1,
+					       IMX214_DEFAULT_PIXEL_RATE);
+
+	imx214->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, NULL,
+						   V4L2_CID_LINK_FREQ,
+						   ARRAY_SIZE(link_freq) - 1,
+						   0, link_freq);
+	if (imx214->link_freq)
+		imx214->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	/*
+	 * WARNING!
+	 * Values obtained reverse engineering blobs and/or devices.
+	 * Ranges and functionality might be wrong.
+	 *
+	 * Sony, please release some register set documentation for the
+	 * device.
+	 *
+	 * Yours sincerely, Ricardo.
+	 */
+	imx214->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx214_ctrl_ops,
+					     V4L2_CID_EXPOSURE,
+					     IMX214_EXPOSURE_MIN,
+					     IMX214_EXPOSURE_MAX,
+					     IMX214_EXPOSURE_STEP,
+					     IMX214_EXPOSURE_DEFAULT);
+
+	imx214->unit_size = v4l2_ctrl_new_std_compound(ctrl_hdlr,
+				NULL,
+				V4L2_CID_UNIT_CELL_SIZE,
+				v4l2_ctrl_ptr_create((void *)&unit_size));
+
+	ret = ctrl_hdlr->error;
+	if (ret) {
+		v4l2_ctrl_handler_free(ctrl_hdlr);
+		dev_err(imx214->dev, "failed to add controls: %d\n", ret);
+		return ret;
+	}
+
+	imx214->sd.ctrl_handler = ctrl_hdlr;
+
+	return 0;
+};
+
 #define MAX_CMD 4
 static int imx214_write_table(struct imx214 *imx214,
 			      const struct reg_8 table[])
@@ -921,13 +984,6 @@ static int imx214_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
 	struct imx214 *imx214;
-	static const s64 link_freq[] = {
-		IMX214_DEFAULT_LINK_FREQ,
-	};
-	static const struct v4l2_area unit_size = {
-		.width = 1120,
-		.height = 1120,
-	};
 	int ret;
 
 	ret = imx214_parse_fwnode(dev);
@@ -983,48 +1039,10 @@ static int imx214_probe(struct i2c_client *client)
 	pm_runtime_enable(imx214->dev);
 	pm_runtime_idle(imx214->dev);
 
-	v4l2_ctrl_handler_init(&imx214->ctrls, 3);
-
-	imx214->pixel_rate = v4l2_ctrl_new_std(&imx214->ctrls, NULL,
-					       V4L2_CID_PIXEL_RATE, 0,
-					       IMX214_DEFAULT_PIXEL_RATE, 1,
-					       IMX214_DEFAULT_PIXEL_RATE);
-	imx214->link_freq = v4l2_ctrl_new_int_menu(&imx214->ctrls, NULL,
-						   V4L2_CID_LINK_FREQ,
-						   ARRAY_SIZE(link_freq) - 1,
-						   0, link_freq);
-	if (imx214->link_freq)
-		imx214->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
-
-	/*
-	 * WARNING!
-	 * Values obtained reverse engineering blobs and/or devices.
-	 * Ranges and functionality might be wrong.
-	 *
-	 * Sony, please release some register set documentation for the
-	 * device.
-	 *
-	 * Yours sincerely, Ricardo.
-	 */
-	imx214->exposure = v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops,
-					     V4L2_CID_EXPOSURE,
-					     IMX214_EXPOSURE_MIN,
-					     IMX214_EXPOSURE_MAX,
-					     IMX214_EXPOSURE_STEP,
-					     IMX214_EXPOSURE_DEFAULT);
-
-	imx214->unit_size = v4l2_ctrl_new_std_compound(&imx214->ctrls,
-				NULL,
-				V4L2_CID_UNIT_CELL_SIZE,
-				v4l2_ctrl_ptr_create((void *)&unit_size));
-	ret = imx214->ctrls.error;
-	if (ret) {
-		dev_err(&client->dev, "%s control init failed (%d)\n",
-			__func__, ret);
-		goto free_ctrl;
-	}
+	ret = imx214_ctrls_init(imx214);
+	if (ret < 0)
+		goto error_power_off;
 
-	imx214->sd.ctrl_handler = &imx214->ctrls;
 	mutex_init(&imx214->mutex);
 	imx214->ctrls.lock = &imx214->mutex;
 
@@ -1054,6 +1072,7 @@ static int imx214_probe(struct i2c_client *client)
 free_ctrl:
 	mutex_destroy(&imx214->mutex);
 	v4l2_ctrl_handler_free(&imx214->ctrls);
+error_power_off:
 	pm_runtime_disable(imx214->dev);
 
 	return ret;