From: Andre Noll <maan@systemlinux.org>
Date: Fri, 11 Jul 2008 12:02:21 +0000 (+1000)
Subject: md: get_disk_info(): Don't convert between signed and unsigned and back.
X-Git-Tag: v2.6.27-rc1~957^2~13
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=26ef379f53993b1da3c19b63257cd47e1d9cd672;p=linux-2.6-omap-h63xx.git

md: get_disk_info(): Don't convert between signed and unsigned and back.

The current code copies a signed int from user space, converts it to
unsigned and passes the unsigned value to find_rdev_nr() which expects
a signed value. Simply pass the signed value from user space directly.

Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: Neil Brown <neilb@suse.de>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index bd1dc72ae52..328e247e2bf 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4186,15 +4186,12 @@ out:
 static int get_disk_info(mddev_t * mddev, void __user * arg)
 {
 	mdu_disk_info_t info;
-	unsigned int nr;
 	mdk_rdev_t *rdev;
 
 	if (copy_from_user(&info, arg, sizeof(info)))
 		return -EFAULT;
 
-	nr = info.number;
-
-	rdev = find_rdev_nr(mddev, nr);
+	rdev = find_rdev_nr(mddev, info.number);
 	if (rdev) {
 		info.major = MAJOR(rdev->bdev->bd_dev);
 		info.minor = MINOR(rdev->bdev->bd_dev);