linux-kernel - [PATCH 4.13 136/160] HID: wacom: bits shifted too much for 9th and 10th buttons

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Date:   Tue, 10 Oct 2017 21:51:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ping Cheng <ping.cheng@...om.com>,
        Matthieu Robin <matthieu@...olu.org>,
        Jiri Kosina <jkosina@...e.cz>,
        Jason Gerecke <killertofu@...il.com>
Subject: [PATCH 4.13 136/160] HID: wacom: bits shifted too much for 9th and 10th buttons

4.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ping Cheng <pinglinux@...il.com>

commit ce06760ba46b66dae50f2519ae76bd15e89b5710 upstream.

Cintiq 12 has 10 expresskey buttons. The bit shift for the last
two buttons were off by 5.

Fixes: c7f0522 ("HID: wacom: Slim down wacom_intuos_pad processing")

Signed-off-by: Ping Cheng <ping.cheng@...om.com>
Tested-by: Matthieu Robin <matthieu@...olu.org>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Cc: Jason Gerecke <killertofu@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hid/wacom_wac.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -567,8 +567,8 @@ static int wacom_intuos_pad(struct wacom
 				keys = data[9] & 0x07;
 			}
 		} else {
-			buttons = ((data[6] & 0x10) << 10) |
-			          ((data[5] & 0x10) << 9)  |
+			buttons = ((data[6] & 0x10) << 5)  |
+			          ((data[5] & 0x10) << 4)  |
 			          ((data[6] & 0x0F) << 4)  |
 			          (data[5] & 0x0F);
 		}