1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c
index d536c5962c99..d15a999363fc 100644
--- a/drivers/rtc/rtc-mv.c
+++ b/drivers/rtc/rtc-mv.c
@@ -222,6 +222,7 @@ static int __init mv_rtc_probe(struct platform_device *pdev)
         struct resource *res;
         struct rtc_plat_data *pdata;
         u32 rtc_time;
+        u32 rtc_date;
         int ret = 0;
 
         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
@@ -257,6 +258,17 @@ static int __init mv_rtc_probe(struct platform_device *pdev)
                 }
         }
 
+        /*
+         * A date after January 19th, 2038 does not fit on 32 bits and
+         * will confuse the kernel and userspace. Reset to a sane date
+         * (January 1st, 2013) if we're after 2038.
+         */
+        rtc_date = readl(pdata->ioaddr + RTC_DATE_REG_OFFS);
+        if (bcd2bin((rtc_date >> RTC_YEAR_OFFS) & 0xff) >= 38) {
+                dev_info(&pdev->dev, "invalid RTC date, resetting to January 1st, 2013\n");
+                writel(0x130101, pdata->ioaddr + RTC_DATE_REG_OFFS);
+        }
+
         pdata->irq = platform_get_irq(pdev, 0);
 
         platform_set_drvdata(pdev, pdata);