Commit e19ff99f authored Jul 17, 2014 by Andrew Duggan Committed by Jiri Kosina Jul 29, 2014

HID: rmi: only bind the hid-rmi driver to the mouse interface of composite USB devices

On composite HID devices there may be multiple HID devices on separate interfaces, but hid-rmi
should only bind to the mouse interface. One example is the Dell Venue 11 Pro's keyboard dock
which contains a composite USB device with a HID touchpad and HID keyboard on separate intefaces.
Since the USB Vendor ID is Synaptic's, hid-core is currently trying to bind hid-rmi to all\of
the HID devices. This patch ensures that hid-rmi only binds to the mouse interface.

related bug:
https://bugzilla.kernel.org/show_bug.cgi?id=80091

Signed-off-by: Andrew Duggan <aduggan@synaptics.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

parent dd3edeb6

drivers/hid/hid-core.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -783,7 +783,9 @@ static int hid_scan_report(struct hid_device *hid)
		* Vendor specific handlings
		*/
		if ((hid->vendor == USB_VENDOR_ID_SYNAPTICS) &&
		(hid->group == HID_GROUP_GENERIC))
		(hid->group == HID_GROUP_GENERIC) &&
		/* only bind to the mouse interface of composite USB devices */
		(hid->bus != BUS_USB \|\| hid->type == HID_TYPE_USBMOUSE))
		/* hid-rmi should take care of them, not hid-generic */
		hid->group = HID_GROUP_RMI;