This is a note to let you know that I've just added the patch titled
iio: imu: adis16400: Fix sign extension
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-imu-adis16400-fix-sign-extension.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 19e353f2b344ad86cea6ebbc0002e5f903480a90 Mon Sep 17 00:00:00 2001
From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Date: Fri, 23 Jan 2015 00:34:02 +0100
Subject: iio: imu: adis16400: Fix sign extension
From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxx>
Acked-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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:
Patches currently in stable-queue which might be from linux@xxxxxxxxxxxxxxxxxx are
queue-3.10/iio-imu-adis16400-fix-sign-extension.patch
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