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

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.comSigned-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent c1b46cd4
......@@ -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
......
......@@ -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;
/**
......
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