From fe79a9ba11962a603fb6af68fcb476e64031e46c Mon Sep 17 00:00:00 2001 From: Soren Brinkmann Date: Mon, 3 Feb 2014 14:34:32 -0800 Subject: [PATCH] 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 Cc: linux-arm-kernel@lists.infradead.org Cc: Daniel Lezcano Cc: Michal Simek Link: http://lkml.kernel.org/r/1391466877-28908-3-git-send-email-soren.brinkmann@xilinx.com Signed-off-by: Thomas Gleixner --- 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 641d91003a45..f85e5fda9c66 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; } /** -- 2.20.1