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Commit 170531ba authored by Seth Forshee's avatar Seth Forshee Committed by Dmitry Torokhov
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Input: sparse-keymap - report KEY_UNKNOWN for unknown scan codes 



This allows for debugging non-functional keys easily from
userspace.

Signed-off-by: default avatarSeth Forshee <seth.forshee@canonical.com>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent f3cf5c4f

drivers/input/sparse-keymap.c

+8 −0
Original line number Diff line number Diff line
@@ -209,6 +209,7 @@ int sparse_keymap_setup(struct input_dev *dev, 
	}



	if (test_bit(EV_KEY, dev->evbit)) {

		__set_bit(KEY_UNKNOWN, dev->keybit);

		__set_bit(EV_MSC, dev->evbit);

		__set_bit(MSC_SCAN, dev->mscbit);

	}
@@ -311,12 +312,19 @@ bool sparse_keymap_report_event(struct input_dev *dev, unsigned int code, 
{

	const struct key_entry *ke =

		sparse_keymap_entry_from_scancode(dev, code);

	struct key_entry unknown_ke;



	if (ke) {

		sparse_keymap_report_entry(dev, ke, value, autorelease);

		return true;

	}



	/* Report an unknown key event as a debugging aid */

	unknown_ke.type = KE_KEY;

	unknown_ke.code = code;

	unknown_ke.keycode = KEY_UNKNOWN;

	sparse_keymap_report_entry(dev, &unknown_ke, value, true);



	return false;

}

EXPORT_SYMBOL(sparse_keymap_report_event);