[PATCH] rtc-s3c.c: fix time setting checks

[Ben Dooks <ben-linux@fluff.org>]

Fix the year check on setting the time with the S3C24XX
RTC driver. Also move the debug to before the set to see
what is going on if it does fail.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

diff -urpN -X ../dontdiff linux-2.6.18-rc4-rtc1/drivers/rtc/rtc-s3c.c linux-2.6.18-rc4-rtc2/drivers/rtc/rtc-s3c.c
--- linux-2.6.18-rc4-rtc1/drivers/rtc/rtc-s3c.c	2006-08-11 22:13:21.000000000 +0100
+++ linux-2.6.18-rc4-rtc2/drivers/rtc/rtc-s3c.c	2006-08-15 21:50:23.000000000 +0100
@@ -153,24 +153,25 @@ static int s3c_rtc_gettime(struct device
 static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
 {
 	void __iomem *base = s3c_rtc_base;
+	int year = tm->tm_year - 100;
 
-	/* the rtc gets round the y2k problem by just not supporting it */
+	pr_debug("set time %02d.%02d.%02d %02d/%02d/%02d\n",
+		 tm->tm_year, tm->tm_mon, tm->tm_mday,
+		 tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+	/* we get around y2k by simply not supporting it */
 
-	if (tm->tm_year > 100) {
+	if (year < 0 || year >= 100) {
 		dev_err(dev, "rtc only supports 100 years\n");
 		return -EINVAL;
 	}
 
-	pr_debug("set time %02d.%02d.%02d %02d/%02d/%02d\n",
-		 tm->tm_year, tm->tm_mon, tm->tm_mday,
-		 tm->tm_hour, tm->tm_min, tm->tm_sec);
-
 	writeb(BIN2BCD(tm->tm_sec),  base + S3C2410_RTCSEC);
 	writeb(BIN2BCD(tm->tm_min),  base + S3C2410_RTCMIN);
 	writeb(BIN2BCD(tm->tm_hour), base + S3C2410_RTCHOUR);
 	writeb(BIN2BCD(tm->tm_mday), base + S3C2410_RTCDATE);
 	writeb(BIN2BCD(tm->tm_mon + 1), base + S3C2410_RTCMON);
-	writeb(BIN2BCD(tm->tm_year - 100), base + S3C2410_RTCYEAR);
+	writeb(BIN2BCD(year), base + S3C2410_RTCYEAR);
 
 	return 0;
 }