lkml.org 
[lkml]   [2009]   [Sep]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
DateWed, 9 Sep 2009 15:35:43 +0800
Subject[PATCH] update clocksource raw_time in timekeeping_suspend
Fromye janboe <>
after resume from suspend, raw_time is not updated in
timekeeping_suspend. CLOCK_MONOTONIC_RAW could not get the real hw
time.
This patch fix this issue.

Signed-off-by: janboe <janboe.ye@gmail.com>
---
kernel/time/timekeeping.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index e8c77d9..8420b85 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -331,6 +331,8 @@ static unsigned long timekeeping_suspend_time;
static int timekeeping_resume(struct sys_device *dev)
{
unsigned long flags;
+ s64 nsec;
+ cycle_t last_cycle, cycle_delta;
unsigned long now = read_persistent_clock();

clocksource_resume();
@@ -346,8 +348,12 @@ static int timekeeping_resume(struct sys_device *dev)
}
update_xtime_cache(0);
/* re-base the last cycle value */
+ last_cycle = clock->cycle_last;
clock->cycle_last = 0;
clock->cycle_last = clocksource_read(clock);
+ cycle_delta = clock->cycle_last - last_cycle;
+ nsec = cyc2ns(clock, cycle_delta);
+ timespec_add_ns(&clock->raw_time, nsec);
clock->error = 0;
timekeeping_suspended = 0;
write_sequnlock_irqrestore(&xtime_lock, flags);

\
 
 \ /
  Last update: 2009-09-09 09:39    [from the cache]
©2003-2010