From: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Date: Thu, 29 May 2014 01:19:58 +0000 (+0800)
Subject: btrfs: replace EINVAL with ERANGE for resize when ULLONG_MAX
X-Git-Tag: firefly_0821_release~176^2~3585^2~58
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=902c68a4da74442f0ab1c0b458f7723a68dfd3b1;p=firefly-linux-kernel-4.4.55.git

btrfs: replace EINVAL with ERANGE for resize when ULLONG_MAX

To be accurate about the error case,
if the new size is beyond ULLONG_MAX, return ERANGE instead of EINVAL.

Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
---

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 219e26fa9069..55f4d717d541 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1593,7 +1593,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
 		new_size = old_size - new_size;
 	} else if (mod > 0) {
 		if (new_size > ULLONG_MAX - old_size) {
-			ret = -EINVAL;
+			ret = -ERANGE;
 			goto out_free;
 		}
 		new_size = old_size + new_size;