From: Thomas Gleixner Date: Fri, 7 Dec 2007 18:16:17 +0000 (+0100) Subject: clockevents: warn once when program_event() is called with negative expiry X-Git-Tag: v3.12-rc1~24498^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=167b1de3ee4e50d65a2bd0a2667c9cd48faf54f3;p=kernel%2Fkernel-generic.git clockevents: warn once when program_event() is called with negative expiry The hrtimer problem with large relative timeouts resulting in a negative expiry time went unnoticed as there is no check in the clockevents_program_event() code. Put a check there with a WARN_ONCE to avoid such problems in the future. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c index 822beeb..5fb139f 100644 --- a/kernel/time/clockevents.c +++ b/kernel/time/clockevents.c @@ -78,6 +78,11 @@ int clockevents_program_event(struct clock_event_device *dev, ktime_t expires, unsigned long long clc; int64_t delta; + if (unlikely(expires.tv64 < 0)) { + WARN_ON_ONCE(1); + return -ETIME; + } + delta = ktime_to_ns(ktime_sub(expires, now)); if (delta <= 0)