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 (file)
--- 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;