From: Martin Kepplinger <martink@posteo.de>
Date: Mon, 6 Jul 2015 22:52:21 +0000 (-0700)
Subject: Input: bma150 - use sign_extend32() for sign extending
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=b7e79329c4e34d63cd374e603ece91f2b2c3331e;p=deliverable%2Flinux.git

Input: bma150 - use sign_extend32() for sign extending

Despite it's name, sign_extend32() is used for 16 bit values aswell.

Signed-off-by: Martin Kepplinger <martink@posteo.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

diff --git a/drivers/input/misc/bma150.c b/drivers/input/misc/bma150.c
index b36831c828d3..c2780493b0ed 100644
--- a/drivers/input/misc/bma150.c
+++ b/drivers/input/misc/bma150.c
@@ -333,10 +333,9 @@ static void bma150_report_xyz(struct bma150_data *bma150)
 	y = ((0xc0 & data[2]) >> 6) | (data[3] << 2);
 	z = ((0xc0 & data[4]) >> 6) | (data[5] << 2);
 
-	/* sign extension */
-	x = (s16) (x << 6) >> 6;
-	y = (s16) (y << 6) >> 6;
-	z = (s16) (z << 6) >> 6;
+	x = sign_extend32(x, 9);
+	y = sign_extend32(y, 9);
+	z = sign_extend32(z, 9);
 
 	input_report_abs(bma150->input, ABS_X, x);
 	input_report_abs(bma150->input, ABS_Y, y);