[PATCH v3 2/2] usb: gadget: s3c: Fix the error handling path in 's3c2410_udc_probe()'

[Christophe JAILLET <christophe.jaillet@wanadoo.fr>]

Some 'clk_prepare_enable()' and 'clk_get()' must be undone in the error
handling path of the probe function, as already done in the remove
function.

Fixes: 3fc154b6b813 ("USB Gadget driver for Samsung s3c2410 ARM SoC")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
v2: Fix a stupid error in the hash in Fixes:
v3: Add Reviewed-by:
---
 drivers/usb/gadget/udc/s3c2410_udc.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c
index b81979b3bdb6..b154b62abefa 100644
--- a/drivers/usb/gadget/udc/s3c2410_udc.c
+++ b/drivers/usb/gadget/udc/s3c2410_udc.c
@@ -1750,7 +1750,8 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 	udc_clock = clk_get(NULL, "usb-device");
 	if (IS_ERR(udc_clock)) {
 		dev_err(dev, "failed to get udc clock source\n");
-		return PTR_ERR(udc_clock);
+		retval = PTR_ERR(udc_clock);
+		goto err_usb_bus_clk;
 	}
 
 	clk_prepare_enable(udc_clock);
@@ -1773,7 +1774,7 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 	base_addr = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base_addr)) {
 		retval = PTR_ERR(base_addr);
-		goto err;
+		goto err_udc_clk;
 	}
 
 	the_controller = udc;
@@ -1791,7 +1792,7 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 	if (retval != 0) {
 		dev_err(dev, "cannot get irq %i, err %d\n", irq_usbd, retval);
 		retval = -EBUSY;
-		goto err;
+		goto err_udc_clk;
 	}
 
 	dev_dbg(dev, "got irq %i\n", irq_usbd);
@@ -1862,7 +1863,14 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 		gpio_free(udc_info->vbus_pin);
 err_int:
 	free_irq(irq_usbd, udc);
-err:
+err_udc_clk:
+	clk_disable_unprepare(udc_clock);
+	clk_put(udc_clock);
+	udc_clock = NULL;
+err_usb_bus_clk:
+	clk_disable_unprepare(usb_bus_clock);
+	clk_put(usb_bus_clock);
+	usb_bus_clock = NULL;
 
 	return retval;
 }
-- 
2.27.0