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| author | Samu Onkalo <samu.p.onkalo@nokia.com> | 2009-11-23 10:01:33 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-11-23 10:16:09 -0800 |
| commit | 11bb4cc7c772963952304398f999fc195b0da285 (patch) | |
| tree | c7e719cb1b4b8dfefcfbc5a96af28dc194aff52e /drivers/input/input-polldev.c | |
| parent | 381f3f1ccf380d4d3c46987d04c199842d4c6e1f (diff) | |
| download | lwn-11bb4cc7c772963952304398f999fc195b0da285.tar.gz lwn-11bb4cc7c772963952304398f999fc195b0da285.zip | |
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>
Diffstat (limited to 'drivers/input/input-polldev.c')
| -rw-r--r-- | drivers/input/input-polldev.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c index 40cf0b058927..6a2eb399b988 100644 --- a/drivers/input/input-polldev.c +++ b/drivers/input/input-polldev.c @@ -88,7 +88,9 @@ static int input_open_polled_device(struct input_dev *input) 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; } |