From 374766bc2aa784f7a0833cc7563f057241ca7815 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Wed, 21 Nov 2007 14:03:37 -0500 Subject: [PATCH] Input: implement proper timer rounding for polled devices Rounding doesn't matter for the first tick, but we want succeeding ticks to be aligned on second boundary if poll interval is large enough. Also: cancel_rearming_delayed_workqueue is marked as obsolete in workqueue.h so use cancel_delayed_work_sync. Signed-off-by: Stephen Hemminger Acked-by: Arjan van de Ven Signed-off-by: Dmitry Torokhov --- drivers/input/input-polldev.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c index 92b359894e81..490918a5d192 100644 --- a/drivers/input/input-polldev.c +++ b/drivers/input/input-polldev.c @@ -60,17 +60,21 @@ static void input_polled_device_work(struct work_struct *work) { struct input_polled_dev *dev = container_of(work, struct input_polled_dev, work.work); + unsigned long delay; dev->poll(dev); - queue_delayed_work(polldev_wq, &dev->work, - msecs_to_jiffies(dev->poll_interval)); + + delay = msecs_to_jiffies(dev->poll_interval); + if (delay >= HZ) + delay = round_jiffies_relative(delay); + + queue_delayed_work(polldev_wq, &dev->work, delay); } static int input_open_polled_device(struct input_dev *input) { struct input_polled_dev *dev = input->private; int error; - unsigned long ticks; error = input_polldev_start_workqueue(); if (error) @@ -79,10 +83,8 @@ static int input_open_polled_device(struct input_dev *input) if (dev->flush) dev->flush(dev); - ticks = msecs_to_jiffies(dev->poll_interval); - if (ticks >= HZ) - ticks = round_jiffies(ticks); - queue_delayed_work(polldev_wq, &dev->work, ticks); + queue_delayed_work(polldev_wq, &dev->work, + msecs_to_jiffies(dev->poll_interval)); return 0; } @@ -91,7 +93,7 @@ static void input_close_polled_device(struct input_dev *input) { struct input_polled_dev *dev = input->private; - cancel_rearming_delayed_workqueue(polldev_wq, &dev->work); + cancel_delayed_work_sync(&dev->work); input_polldev_stop_workqueue(); } -- GitLab