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authorJohn Stultz <johnstul@us.ibm.com>2012-07-13 01:21:50 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-08-01 12:26:53 -0700
commitdccecc646f06f06db8c32fc6615fee847852cec6 (patch)
tree00c8e7470ccae611edfdf7567d0c200d1a2ad9d2 /kernel
parentadccea444c2df5660fff32fe75563075b7d237f7 (diff)
ntp: Fix STA_INS/DEL clearing bug
commit 6b1859dba01c7d512b72d77e3fd7da8354235189 upstream. In commit 6b43ae8a619d17c4935c3320d2ef9e92bdeed05d, I introduced a bug that kept the STA_INS or STA_DEL bit from being cleared from time_status via adjtimex() without forcing STA_PLL first. Usually once the STA_INS is set, it isn't cleared until the leap second is applied, so its unlikely this affected anyone. However during testing I noticed it took some effort to cancel a leap second once STA_INS was set. Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1342156917-25092-2-git-send-email-john.stultz@linaro.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/time/ntp.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index f1eb182b5fe0..61fc450643b2 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -375,7 +375,9 @@ int second_overflow(unsigned long secs)
time_state = TIME_DEL;
break;
case TIME_INS:
- if (secs % 86400 == 0) {
+ if (!(time_status & STA_INS))
+ time_state = TIME_OK;
+ else if (secs % 86400 == 0) {
leap = -1;
time_state = TIME_OOP;
time_tai++;
@@ -384,7 +386,9 @@ int second_overflow(unsigned long secs)
}
break;
case TIME_DEL:
- if ((secs + 1) % 86400 == 0) {
+ if (!(time_status & STA_DEL))
+ time_state = TIME_OK;
+ else if ((secs + 1) % 86400 == 0) {
leap = 1;
time_tai--;
time_state = TIME_WAIT;