From: Liu Bo <bo.li.liu@oracle.com>
Date: Tue, 14 May 2013 02:12:15 +0000 (+0000)
Subject: Btrfs: return errno if possible when we fail to allocate memory
X-Git-Tag: v3.10-rc2~7^2^2~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b9aa55bed1c1a3a329da31884b643c62d57ebb21;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

Btrfs: return errno if possible when we fail to allocate memory

We need to set return value explicitly, otherwise we'll lose the error
value.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 1669c3b..99a9c25 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -714,8 +714,10 @@ retry:
 					async_extent->ram_size - 1, 0);
 
 		em = alloc_extent_map();
-		if (!em)
+		if (!em) {
+			ret = -ENOMEM;
 			goto out_free_reserve;
+		}
 		em->start = async_extent->start;
 		em->len = async_extent->ram_size;
 		em->orig_start = em->start;
@@ -922,8 +924,10 @@ static noinline int __cow_file_range(struct btrfs_trans_handle *trans,
 		}
 
 		em = alloc_extent_map();
-		if (!em)
+		if (!em) {
+			ret = -ENOMEM;
 			goto out_reserve;
+		}
 		em->start = start;
 		em->orig_start = em->start;
 		ram_size = ins.offset;