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Subject[tip:timers/core] ntp: Remove redundant and incorrect parameter check
Commit-ID:  db1c1cce4a653dcbe6949c72ae7b9f42cab1b929
Gitweb: http://git.kernel.org/tip/db1c1cce4a653dcbe6949c72ae7b9f42cab1b929
Author: Richard Cochran <richardcochran@gmail.com>
AuthorDate: Fri, 18 Feb 2011 10:07:25 +0100
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Fri, 18 Feb 2011 17:01:12 +0100

ntp: Remove redundant and incorrect parameter check

The ADJ_SETOFFSET code redundantly checks the range of the nanoseconds
field of the time value. This field is checked again in the subsequent
call to timekeeping_inject_offset(). Also, as is, the check will not
detect whether the number of microseconds is out of range.

Let timekeeping_inject_offset() do the error checking.

Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Cc: johnstul@us.ibm.com
LKML-Reference: <20110218090724.GA2924@riccoc20.at.omicron.at>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
kernel/time/ntp.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 5ac5932..5f1bb8e 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -650,13 +650,13 @@ int do_adjtimex(struct timex *txc)

if (txc->modes & ADJ_SETOFFSET) {
struct timespec delta;
- if ((unsigned long)txc->time.tv_usec >= NSEC_PER_SEC)
- return -EINVAL;
delta.tv_sec = txc->time.tv_sec;
delta.tv_nsec = txc->time.tv_usec;
if (!(txc->modes & ADJ_NANO))
delta.tv_nsec *= 1000;
- timekeeping_inject_offset(&delta);
+ result = timekeeping_inject_offset(&delta);
+ if (result)
+ return result;
}

getnstimeofday(&ts);

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