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>
diff --git a/drivers/input/tablet/gtco.c b/drivers/input/tablet/gtco.c
index 8580456..3a7f3a4 100644
--- a/drivers/input/tablet/gtco.c
+++ b/drivers/input/tablet/gtco.c
@@ -59,7 +59,7 @@
#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 @@
struct input_dev *inputdev;
int rc;
u32 val = 0;
- s8 valsigned = 0;
char le_buffer[2];
inputdev = device->inputdevice;
@@ -665,20 +664,11 @@
/* 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: