[PATCH] rtc: omap: Handle return value of clk_prepare_enable.

[Arvind Yadav]

- clk_prepare_enable() can fail here and we must check its return value.
- Add missing clk_disable_unprepare(), if omap_rtc_probe is not successful.

Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com>
---
 drivers/rtc/rtc-omap.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 13f7cd1..83b876d 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -705,13 +705,19 @@ static int omap_rtc_probe(struct platform_device *pdev)
        else
                rtc->clk = devm_clk_get(&pdev->dev, "int-clk");
 
-       if (!IS_ERR(rtc->clk))
-               clk_prepare_enable(rtc->clk);
+       if (IS_ERR(rtc->clk))
+               return PTR_ERR(rtc->clk);
+
+       ret = clk_prepare_enable(rtc->clk);
+       if (ret)
+               return ret;
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        rtc->base = devm_ioremap_resource(&pdev->dev, res);
-       if (IS_ERR(rtc->base))
-               return PTR_ERR(rtc->base);
+       if (IS_ERR(rtc->base)) {
+               ret = PTR_ERR(rtc->base);
+               goto err_clk;
+       }
 
        platform_set_drvdata(pdev, rtc);
 
@@ -830,7 +836,8 @@ static int omap_rtc_probe(struct platform_device *pdev)
        rtc->pctldev = pinctrl_register(&rtc_pinctrl_desc, &pdev->dev, rtc);
        if (IS_ERR(rtc->pctldev)) {
                dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
-               return PTR_ERR(rtc->pctldev);
+               ret = PTR_ERR(rtc->pctldev);
+               goto err;
        }
 
        return 0;
@@ -841,6 +848,8 @@ static int omap_rtc_probe(struct platform_device *pdev)
        pm_runtime_put_sync(&pdev->dev);
        pm_runtime_disable(&pdev->dev);
 
+err_clk:
+       clk_disable_unprepare(rtc->clk);
        return ret;
 }
 
-- 
1.9.1