Commit 39be39ce authored by Andrzej Pietrasiewicz's avatar Andrzej Pietrasiewicz Committed by Dmitry Torokhov
Browse files

Input: add input_device_enabled() 



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: default avatarAndrzej Pietrasiewicz <andrzej.p@collabora.com>
Link: https://lore.kernel.org/r/20200608112211.12125-2-andrzej.p@collabora.com


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent c1b46cd4

drivers/input/input.c

+8 −0
Original line number Diff line number Diff line
@@ -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

include/linux/input.h

+2 −0
Original line number Diff line number Diff line
@@ -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;



/**