Commit-ID: fe79a9ba11962a603fb6af68fcb476e64031e46c
Gitweb: http://git.kernel.org/tip/fe79a9ba11962a603fb6af68fcb476e64031e46c
Author: Soren Brinkmann <soren.brinkmann@xxxxxxxxxx>
AuthorDate: Mon, 3 Feb 2014 14:34:32 -0800
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Fri, 7 Feb 2014 15:34:29 +0100
clockevents: Adjust timer interval when frequency changes
clockevent devices in periodic mode are not updated when the frequency
of the device changes. Issue a dev->set_mode() callback which forces
the device to reevaluate the timer settings.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Cc: Michal Simek <michal.simek@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1391466877-28908-3-git-send-email-soren.brinkmann@xxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
kernel/time/clockevents.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 641d910..f85e5fd 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -443,10 +443,13 @@ int __clockevents_update_freq(struct clock_event_device *dev, u32 freq)
{
clockevents_config(dev, freq);
- if (dev->mode != CLOCK_EVT_MODE_ONESHOT)
- return 0;
+ if (dev->mode == CLOCK_EVT_MODE_ONESHOT)
+ return clockevents_program_event(dev, dev->next_event, false);
+
+ if (dev->mode == CLOCK_EVT_MODE_PERIODIC)
+ dev->set_mode(CLOCK_EVT_MODE_PERIODIC, dev);
- return clockevents_program_event(dev, dev->next_event, false);
+ return 0;
}
/**
--
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