[PATCH -next] rtc: stmp3xxx: Add failure handling for stmp3xxx_wdt_register()

[Lin Yujun]

Use platform_device_put() to free platform device before print
error message when platform_device_add() fails to run. Add dev_err()
to report error in case of alloc memory to wdt_pdev fail.

Fixes: 1a71fb84fda6 ("rtc: stmp3xxx: add wdt-accessor function")
Signed-off-by: Lin Yujun <linyujun809 at huawei.com>
---
 drivers/rtc/rtc-stmp3xxx.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index 40c0f7ed36e0..b2f4b034cdb6 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -107,6 +107,11 @@ static void stmp3xxx_wdt_register(struct platform_device *rtc_pdev)
 		wdt_pdev->dev.parent = &rtc_pdev->dev;
 		wdt_pdev->dev.platform_data = &wdt_pdata;
 		rc = platform_device_add(wdt_pdev);
+		if (rc)
+			platform_device_put(wdt_pdev);
+	} else {
+		dev_err(&rtc_pdev->dev,
+			"failed to allocate stmp3xxx_rtc_wdt\n");
 	}
 
 	if (rc)
-- 
2.17.1