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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>
This commit is contained in:
Andrew Duggan 2014-07-17 16:14:45 -07:00 committed by Jiri Kosina
parent dd3edeb6a0
commit e19ff99f25
1 changed files with 3 additions and 1 deletions
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4
drivers/hid/hid-core.c
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@ -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;