linux-kernel - [PATCH 3/4] HID: uclogic: present only the working interfaces on the Huion tablets

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Date:	Tue, 24 Feb 2015 19:05:29 -0500
From:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:	Nikolai Kondrashov <spbnick@...il.com>,
	Jiri Kosina <jkosina@...e.cz>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	DIGImend-devel <DIGImend-devel@...ts.sourceforge.net>
Subject: [PATCH 3/4] HID: uclogic: present only the working interfaces on the Huion tablets

The Huion tablets show 3 interfaces. Only the first and the third
are currently used.
Also remove HID_QUIRK_MULTI_INPUT for the third interface to not
create more than needed input nodes.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
---
 drivers/hid/hid-uclogic.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/hid/hid-uclogic.c b/drivers/hid/hid-uclogic.c
index 397f1df..c03e076 100644
--- a/drivers/hid/hid-uclogic.c
+++ b/drivers/hid/hid-uclogic.c
@@ -840,6 +840,11 @@ static int uclogic_probe(struct hid_device *hdev,
 				hid_err(hdev, "tablet enabling failed\n");
 				return rc;
 			}
+		} else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
+			hdev->quirks &= ~HID_QUIRK_MULTI_INPUT;
+		} else {
+			/* Ignore all unused interfaces */
+			return -ENODEV;
 		}
 		break;
 	}
-- 
2.1.0

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