diff --git a/[refs] b/[refs]
index fbcbbdbbcc31..73cdb34f121b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 80e3e5328a9978fae3654ead657e9df653508713
+refs/heads/master: 257a1ec603538036a2f2ae7e8433d775b7a7588a
diff --git a/trunk/drivers/input/misc/mma8450.c b/trunk/drivers/input/misc/mma8450.c
index 480557f14f23..f3309696d053 100644
--- a/trunk/drivers/input/misc/mma8450.c
+++ b/trunk/drivers/input/misc/mma8450.c
@@ -123,9 +123,9 @@ static void mma8450_poll(struct input_polled_dev *dev)
 	if (ret < 0)
 		return;
 
-	x = ((buf[1] << 4) & 0xff0) | (buf[0] & 0xf);
-	y = ((buf[3] << 4) & 0xff0) | (buf[2] & 0xf);
-	z = ((buf[5] << 4) & 0xff0) | (buf[4] & 0xf);
+	x = ((int)(s8)buf[1] << 4) | (buf[0] & 0xf);
+	y = ((int)(s8)buf[3] << 4) | (buf[2] & 0xf);
+	z = ((int)(s8)buf[5] << 4) | (buf[4] & 0xf);
 
 	input_report_abs(dev->input, ABS_X, x);
 	input_report_abs(dev->input, ABS_Y, y);