Input: polled device - do not start polling if interval is zero
If the poll interval is set to 0 via new sysfs entry and device is
opened after that, polling is started with interval 0. This causes
huge CPU load. Same happens if the rate was 0 when the device was
closed and then reopened.
Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c
index 40cf0b0..6a2eb39 100644
--- a/drivers/input/input-polldev.c
+++ b/drivers/input/input-polldev.c
@@ -88,7 +88,9 @@
if (dev->open)
dev->open(dev);
- queue_delayed_work(polldev_wq, &dev->work, 0);
+ /* Only start polling if polling is enabled */
+ if (dev->poll_interval > 0)
+ queue_delayed_work(polldev_wq, &dev->work, 0);
return 0;
}