X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Frtc%2Frtc-isl1208.c;h=054e05294af8566e30d3834fc23c793b615239f9;hb=a8022697811c3f2271df5ec14fa6f518b731b46a;hp=2cd77ab8fc66b06e43d3b908884a9f4fe8603ca1;hpb=92b29b86fe2e183d44eb467e5e74a5f718ef2e43;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c
index 2cd77ab8fc6..054e05294af 100644
--- a/drivers/rtc/rtc-isl1208.c
+++ b/drivers/rtc/rtc-isl1208.c
@@ -328,6 +328,13 @@ isl1208_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm)
 	int sr;
 	u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, };
 
+	/* The clock has an 8 bit wide bcd-coded register (they never learn)
+	 * for the year. tm_year is an offset from 1900 and we are interested
+	 * in the 2000-2099 range, so any value less than 100 is invalid.
+	 */
+	if (tm->tm_year < 100)
+		return -EINVAL;
+
 	regs[ISL1208_REG_SC] = bin2bcd(tm->tm_sec);
 	regs[ISL1208_REG_MN] = bin2bcd(tm->tm_min);
 	regs[ISL1208_REG_HR] = bin2bcd(tm->tm_hour) | ISL1208_REG_HR_MIL;