media: platform: sti: c8sectpfe: core: Add of_node_put() at goto

Each iteration of for_each_child_of_node puts the previous node, but in
the case of a goto from the middle of the loop, there is no put, thus
causing a memory leak. Hence add a new label that puts the last used
node, and edit the goto statements in the middle of the loop to first go
to the new label.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <[email protected]>
Acked-by: Patrice Chotard <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c

@@ -765,7 +765,7 @@ static int c8sectpfe_probe(struct platform_device *pdev)
 
 		if (!fei->channel_data[index]) {
 			ret = -ENOMEM;
-			goto err_clk_disable;
+			goto err_node_put;
 		}
 
 		tsin = fei->channel_data[index];
@@ -775,7 +775,7 @@ static int c8sectpfe_probe(struct platform_device *pdev)
 		ret = of_property_read_u32(child, "tsin-num", &tsin->tsin_id);
 		if (ret) {
 			dev_err(&pdev->dev, "No tsin_num found\n");
-			goto err_clk_disable;
+			goto err_node_put;
 		}
 
 		/* sanity check value */
@@ -784,7 +784,7 @@ static int c8sectpfe_probe(struct platform_device *pdev)
 				"tsin-num %d specified greater than number\n\tof input block hw in SoC! (%d)",
 				tsin->tsin_id, fei->hw_stats.num_ib);
 			ret = -EINVAL;
-			goto err_clk_disable;
+			goto err_node_put;
 		}
 
 		tsin->invert_ts_clk = of_property_read_bool(child,
@@ -800,22 +800,22 @@ static int c8sectpfe_probe(struct platform_device *pdev)
 					&tsin->dvb_card);
 		if (ret) {
 			dev_err(&pdev->dev, "No dvb-card found\n");
-			goto err_clk_disable;
+			goto err_node_put;
 		}
 
 		i2c_bus = of_parse_phandle(child, "i2c-bus", 0);
 		if (!i2c_bus) {
 			dev_err(&pdev->dev, "No i2c-bus found\n");
 			ret = -ENODEV;
-			goto err_clk_disable;
+			goto err_node_put;
 		}
 		tsin->i2c_adapter =
 			of_find_i2c_adapter_by_node(i2c_bus);
 		if (!tsin->i2c_adapter) {
 			dev_err(&pdev->dev, "No i2c adapter found\n");
 			of_node_put(i2c_bus);
 			ret = -ENODEV;
-			goto err_clk_disable;
+			goto err_node_put;
 		}
 		of_node_put(i2c_bus);
 
@@ -826,15 +826,15 @@ static int c8sectpfe_probe(struct platform_device *pdev)
 			dev_err(dev,
 				"reset gpio for tsin%d not valid (gpio=%d)\n",
 				tsin->tsin_id, tsin->rst_gpio);
-			goto err_clk_disable;
+			goto err_node_put;
 		}
 
 		ret = devm_gpio_request_one(dev, tsin->rst_gpio,
 					GPIOF_OUT_INIT_LOW, "NIM reset");
 		if (ret && ret != -EBUSY) {
 			dev_err(dev, "Can't request tsin%d reset gpio\n"
 				, fei->channel_data[index]->tsin_id);
-			goto err_clk_disable;
+			goto err_node_put;
 		}
 
 		if (!ret) {
@@ -877,6 +877,8 @@ static int c8sectpfe_probe(struct platform_device *pdev)
 
 	return 0;
 
+err_node_put:
+	of_node_put(child);
 err_clk_disable:
 	clk_disable_unprepare(fei->c8sectpfeclk);
 	return ret;