--- /dev/null
+From 19e353f2b344ad86cea6ebbc0002e5f903480a90 Mon Sep 17 00:00:00 2001
+From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
+Date: Fri, 23 Jan 2015 00:34:02 +0100
+Subject: iio: imu: adis16400: Fix sign extension
+
+From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
+
+commit 19e353f2b344ad86cea6ebbc0002e5f903480a90 upstream.
+
+The intention is obviously to sign-extend a 12 bit quantity. But
+because of C's promotion rules, the assignment is equivalent to "val16
+&= 0xfff;". Use the proper API for this.
+
+Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
+Acked-by: Lars-Peter Clausen <lars@metafoo.de>
+Signed-off-by: Jonathan Cameron <jic23@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/iio/imu/adis16400_core.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/drivers/iio/imu/adis16400_core.c
++++ b/drivers/iio/imu/adis16400_core.c
+@@ -26,6 +26,7 @@
+ #include <linux/list.h>
+ #include <linux/module.h>
+ #include <linux/debugfs.h>
++#include <linux/bitops.h>
+
+ #include <linux/iio/iio.h>
+ #include <linux/iio/sysfs.h>
+@@ -447,7 +448,7 @@ static int adis16400_read_raw(struct iio
+ mutex_unlock(&indio_dev->mlock);
+ if (ret)
+ return ret;
+- val16 = ((val16 & 0xFFF) << 4) >> 4;
++ val16 = sign_extend32(val16, 11);
+ *val = val16;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_OFFSET: