usb: musb: omap2430: fix device leak at unbind

Make sure to drop the reference to the control device taken by
of_find_device_by_node() during probe when the driver is unbound.

Fixes: 8934d3e ("usb: musb: omap2430: Don't use omap_get_control_dev()")
Cc: [email protected]	# 3.13
Cc: Roger Quadros <[email protected]>
Signed-off-by: Johan Hovold <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: jhovold

drivers/usb/musb/omap2430.c

@@ -400,7 +400,7 @@ static int omap2430_probe(struct platform_device *pdev)
 	ret = platform_device_add_resources(musb, pdev->resource, pdev->num_resources);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to add resources\n");
-		goto err2;
+		goto err_put_control_otghs;
 	}
 
 	if (populate_irqs) {
@@ -413,7 +413,7 @@ static int omap2430_probe(struct platform_device *pdev)
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 		if (!res) {
 			ret = -EINVAL;
-			goto err2;
+			goto err_put_control_otghs;
 		}
 
 		musb_res[i].start = res->start;
@@ -441,14 +441,14 @@ static int omap2430_probe(struct platform_device *pdev)
 		ret = platform_device_add_resources(musb, musb_res, i);
 		if (ret) {
 			dev_err(&pdev->dev, "failed to add IRQ resources\n");
-			goto err2;
+			goto err_put_control_otghs;
 		}
 	}
 
 	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
 	if (ret) {
 		dev_err(&pdev->dev, "failed to add platform_data\n");
-		goto err2;
+		goto err_put_control_otghs;
 	}
 
 	pm_runtime_enable(glue->dev);
@@ -463,7 +463,9 @@ static int omap2430_probe(struct platform_device *pdev)
 
 err3:
 	pm_runtime_disable(glue->dev);
-
+err_put_control_otghs:
+	if (!IS_ERR(glue->control_otghs))
+		put_device(glue->control_otghs);
 err2:
 	platform_device_put(musb);
 
@@ -477,6 +479,8 @@ static void omap2430_remove(struct platform_device *pdev)
 
 	platform_device_unregister(glue->musb);
 	pm_runtime_disable(glue->dev);
+	if (!IS_ERR(glue->control_otghs))
+		put_device(glue->control_otghs);
 }
 
 #ifdef CONFIG_PM