HID: handle all multitouch devices through hid-multitouch
When the quirk HID_QUIRK_MULTITOUCH is present and when hid-multitouch
is loaded, let's pass the device to hid-multitouch even if it has
not been registered in hid-multitouch.
If any other driver wants to take precedence over hid-multitouch,
the usual way of adding it to hid_have_special_driver will work as
the quirk HID_QUIRK_MULTITOUCH won't be set by the generic hid layer.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 2088ab4..a61ba42 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -637,10 +637,12 @@
struct mt_device *td;
struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
- for (i = 0; mt_classes[i].name ; i++) {
- if (id->driver_data == mt_classes[i].name) {
- mtclass = &(mt_classes[i]);
- break;
+ if (id) {
+ for (i = 0; mt_classes[i].name ; i++) {
+ if (id->driver_data == mt_classes[i].name) {
+ mtclass = &(mt_classes[i]);
+ break;
+ }
}
}
@@ -648,6 +650,7 @@
* that emit events over several HID messages.
*/
hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
+ hdev->quirks &= ~HID_QUIRK_MULTITOUCH;
td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
if (!td) {