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authorMartin Kepplinger <martink@posteo.de>2015-01-23 16:40:53 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2015-01-26 23:07:45 -0800
commit8d2128203682cb1b223e08f19c6b3ba72400bb96 (patch)
treebecd3f84a9dd775676ee2bf884e7b38be787eef8 /drivers/input/tablet
parentbb03bf3f8427a38112819061fc8688999ba02f67 (diff)
Input: gtco - use sign_extend32() for sign extension
Signed-off-by: Martin Kepplinger <martink@posteo.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/tablet')
-rw-r--r--drivers/input/tablet/gtco.c20
1 files changed, 5 insertions, 15 deletions
diff --git a/drivers/input/tablet/gtco.c b/drivers/input/tablet/gtco.c
index 858045694e9d..3a7f3a4a4396 100644
--- a/drivers/input/tablet/gtco.c
+++ b/drivers/input/tablet/gtco.c
@@ -59,7 +59,7 @@ Scott Hill shill@gtcocalcomp.com
#include <asm/uaccess.h>
#include <asm/unaligned.h>
#include <asm/byteorder.h>
-
+#include <linux/bitops.h>
#include <linux/usb/input.h>
@@ -614,7 +614,6 @@ static void gtco_urb_callback(struct urb *urbinfo)
struct input_dev *inputdev;
int rc;
u32 val = 0;
- s8 valsigned = 0;
char le_buffer[2];
inputdev = device->inputdevice;
@@ -665,20 +664,11 @@ static void gtco_urb_callback(struct urb *urbinfo)
/* Fall thru */
case 4:
/* Tilt */
+ input_report_abs(inputdev, ABS_TILT_X,
+ sign_extend32(device->buffer[6], 6));
- /* Sign extend these 7 bit numbers. */
- if (device->buffer[6] & 0x40)
- device->buffer[6] |= 0x80;
-
- if (device->buffer[7] & 0x40)
- device->buffer[7] |= 0x80;
-
-
- valsigned = (device->buffer[6]);
- input_report_abs(inputdev, ABS_TILT_X, (s32)valsigned);
-
- valsigned = (device->buffer[7]);
- input_report_abs(inputdev, ABS_TILT_Y, (s32)valsigned);
+ input_report_abs(inputdev, ABS_TILT_Y,
+ sign_extend32(device->buffer[7], 6));
/* Fall thru */
case 2: