From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Date: Thu, 6 Jul 2017 09:42:06 +0000 (+0200)
Subject: rtc: ds1307: switch to rtc_register_device
X-Git-Tag: v4.14-rc1~479^2~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=69b119a642b7e143be08f9cbabca7bc910f5720d;p=platform%2Fkernel%2Flinux-rpi.git

rtc: ds1307: switch to rtc_register_device

This removes a possible race condition and crash and allows for further
improvement of the driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 57ea254..6f94f20 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -1674,8 +1674,8 @@ read_rtc:
 		device_set_wakeup_capable(ds1307->dev, true);
 		set_bit(HAS_ALARM, &ds1307->flags);
 	}
-	ds1307->rtc = devm_rtc_device_register(ds1307->dev, ds1307->name,
-				rtc_ops, THIS_MODULE);
+
+	ds1307->rtc = devm_rtc_allocate_device(ds1307->dev);
 	if (IS_ERR(ds1307->rtc)) {
 		return PTR_ERR(ds1307->rtc);
 	}
@@ -1737,6 +1737,11 @@ read_rtc:
 		}
 	}
 
+	ds1307->rtc->ops = rtc_ops;
+	err = rtc_register_device(ds1307->rtc);
+	if (err)
+		return err;
+
 	ds1307_hwmon_register(ds1307);
 	ds1307_clks_register(ds1307);