diff options
| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2015-03-03 12:44:04 -0500 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2015-03-03 21:31:55 +0100 |
| commit | aa2121ac477845eb64d46278e93765b82a005c90 (patch) | |
| tree | c74f3c29a908d9a21e13ea670a5ac283011d3ef8 /drivers/hid/hid-uclogic.c | |
| parent | 002a82ded6a7f4e402b1f9b953d7393ec290b709 (diff) | |
| download | lwn-aa2121ac477845eb64d46278e93765b82a005c90.tar.gz lwn-aa2121ac477845eb64d46278e93765b82a005c90.zip | |
HID: uclogic: discard the extra Pen input node on Huion tablets
Some Huion tablets present 2 HID Pen interfaces. Only one is used, so
we can drop the unused one.
Reviewed-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-uclogic.c')
| -rw-r--r-- | drivers/hid/hid-uclogic.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/hid/hid-uclogic.c b/drivers/hid/hid-uclogic.c index ada8a9437e3e..f44e72bc1a0a 100644 --- a/drivers/hid/hid-uclogic.c +++ b/drivers/hid/hid-uclogic.c @@ -713,6 +713,25 @@ static __u8 *uclogic_report_fixup(struct hid_device *hdev, __u8 *rdesc, return rdesc; } +static int uclogic_input_mapping(struct hid_device *hdev, struct hid_input *hi, + struct hid_field *field, struct hid_usage *usage, + unsigned long **bit, int *max) +{ + struct usb_interface *intf; + + if (hdev->product == USB_DEVICE_ID_HUION_TABLET) { + intf = to_usb_interface(hdev->dev.parent); + + /* discard the unused pen interface */ + if ((intf->cur_altsetting->desc.bInterfaceNumber != 0) && + (field->application == HID_DG_PEN)) + return -1; + } + + /* let hid-core decide what to do */ + return 0; +} + static void uclogic_input_configured(struct hid_device *hdev, struct hid_input *hi) { @@ -947,6 +966,7 @@ static struct hid_driver uclogic_driver = { .probe = uclogic_probe, .report_fixup = uclogic_report_fixup, .raw_event = uclogic_raw_event, + .input_mapping = uclogic_input_mapping, .input_configured = uclogic_input_configured, }; module_hid_driver(uclogic_driver); |