[PATCH] usb: dwc3: exynos: Handle return value of clk_prepare_enable

[Arvind Yadav]

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com>
---
 drivers/usb/dwc3/dwc3-exynos.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index 98f74ff..e089df7 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -125,12 +125,16 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
                dev_err(dev, "couldn't get clock\n");
                return -EINVAL;
        }
-       clk_prepare_enable(exynos->clk);
+       ret = clk_prepare_enable(exynos->clk);
+       if (ret)
+               return ret;
 
        exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk");
        if (IS_ERR(exynos->susp_clk))
                exynos->susp_clk = NULL;
-       clk_prepare_enable(exynos->susp_clk);
+       ret = clk_prepare_enable(exynos->susp_clk);
+       if (ret)
+               goto susp_clk_err;
 
        if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) {
                exynos->axius_clk = devm_clk_get(dev, "usbdrd30_axius_clk");
@@ -139,7 +143,9 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
                        ret = -ENODEV;
                        goto axius_clk_err;
                }
-               clk_prepare_enable(exynos->axius_clk);
+               ret = clk_prepare_enable(exynos->axius_clk);
+               if (ret)
+                       goto axius_clk_err;
        } else {
                exynos->axius_clk = NULL;
        }
@@ -197,6 +203,7 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
        clk_disable_unprepare(exynos->axius_clk);
 axius_clk_err:
        clk_disable_unprepare(exynos->susp_clk);
+susp_clk_err:
        clk_disable_unprepare(exynos->clk);
        return ret;
 }
-- 
1.9.1