| Message ID | 20200608112211.12125-2-andrzej.p@collabora.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [v4,1/7] Input: add input_device_enabled() | expand |
On Mon, Jun 08, 2020 at 01:22:05PM +0200, Andrzej Pietrasiewicz wrote: > A helper function for drivers to decide if the device is used or not. > A lockdep check is introduced as inspecting ->users should be done under > input device's mutex. > > Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> Applied, thank you.
diff --git a/drivers/input/input.c b/drivers/input/input.c index 3cfd2c18eebd..41377bfa142d 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -2127,6 +2127,14 @@ void input_enable_softrepeat(struct input_dev *dev, int delay, int period) } EXPORT_SYMBOL(input_enable_softrepeat); +bool input_device_enabled(struct input_dev *dev) +{ + lockdep_assert_held(&dev->mutex); + + return dev->users > 0; +} +EXPORT_SYMBOL_GPL(input_device_enabled); + /** * input_register_device - register device with input core * @dev: device to be registered diff --git a/include/linux/input.h b/include/linux/input.h index 56f2fd32e609..eda4587dba67 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -502,6 +502,8 @@ bool input_match_device_id(const struct input_dev *dev, void input_enable_softrepeat(struct input_dev *dev, int delay, int period); +bool input_device_enabled(struct input_dev *dev); + extern struct class input_class; /**
A helper function for drivers to decide if the device is used or not. A lockdep check is introduced as inspecting ->users should be done under input device's mutex. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> --- drivers/input/input.c | 8 ++++++++ include/linux/input.h | 2 ++ 2 files changed, 10 insertions(+)