rtc: fix coh901331 startup crash

The rtc_device_register() call has changed semantics so that it
will immediately call out to rtc_read_alarm() and since the
callbacks require the drvdata to be set, we need to set it before
the registration call to avoid NULL dereference.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c
index 316f484..80f9c88 100644 (file)
--- a/drivers/rtc/rtc-coh901331.c
+++ b/drivers/rtc/rtc-coh901331.c
@@ -220,6 +220,7 @@ static int __init coh901331_probe(struct platform_device *pdev)
        }
        clk_disable(rtap->clk);
 
+       platform_set_drvdata(pdev, rtap);
        rtap->rtc = rtc_device_register("coh901331", &pdev->dev, &coh901331_ops,
                                         THIS_MODULE);
        if (IS_ERR(rtap->rtc)) {
@@ -227,11 +228,10 @@ static int __init coh901331_probe(struct platform_device *pdev)
                goto out_no_rtc;
        }
 
-       platform_set_drvdata(pdev, rtap);
-
        return 0;
 
  out_no_rtc:
+       platform_set_drvdata(pdev, NULL);
  out_no_clk_enable:
        clk_put(rtap->clk);
  out_no_clk: