ntp: Make periodic RTC update more reliable

[uclinux-h8/linux.git] / kernel / time / ntp.c

diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 8f5b3b9..ab1fa7c 100644 (file)
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -475,6 +475,7 @@ static void sync_cmos_clock(struct work_struct *work)
         * called as close as possible to 500 ms before the new second starts.
         * This code is run on a timer.  If the clock is set, that timer
         * may not expire at the correct time.  Thus, we adjust...
+        * We want the clock to be within a couple of ticks from the target.
         */
        if (!ntp_synced()) {
                /*
@@ -485,7 +486,7 @@ static void sync_cmos_clock(struct work_struct *work)
        }
 
        getnstimeofday(&now);
-       if (abs(now.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec / 2) {
+       if (abs(now.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec * 5) {
                struct timespec adjust = now;
 
                fail = -ENODEV;