btrfs: csum_tree_block: return proper errno value

Signed-off-by: Alex Lyakas <alex@zadarastorage.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index a998ef1..9cafae5 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -302,7 +302,7 @@ static int csum_tree_block(struct btrfs_fs_info *fs_info,
                err = map_private_extent_buffer(buf, offset, 32,
                                        &kaddr, &map_start, &map_len);
                if (err)
-                       return 1;
+                       return err;
                cur_len = min(len, map_len - (offset - map_start));
                crc = btrfs_csum_data(kaddr + offset - map_start,
                                      crc, cur_len);
@@ -312,7 +312,7 @@ static int csum_tree_block(struct btrfs_fs_info *fs_info,
        if (csum_size > sizeof(inline_result)) {
                result = kzalloc(csum_size, GFP_NOFS);
                if (!result)
-                       return 1;
+                       return -ENOMEM;
        } else {
                result = (char *)&inline_result;
        }
@@ -333,7 +333,7 @@ static int csum_tree_block(struct btrfs_fs_info *fs_info,
                                val, found, btrfs_header_level(buf));
                        if (result != (char *)&inline_result)
                                kfree(result);
-                       return 1;
+                       return -EUCLEAN;
                }
        } else {
                write_extent_buffer(buf, result, 0, csum_size);
@@ -515,8 +515,7 @@ static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page)
        found_start = btrfs_header_bytenr(eb);
        if (WARN_ON(found_start != start || !PageUptodate(page)))
                return 0;
-       csum_tree_block(fs_info, eb, 0);
-       return 0;
+       return csum_tree_block(fs_info, eb, 0);
 }
 
 static int check_tree_block_fsid(struct btrfs_fs_info *fs_info,
@@ -660,10 +659,8 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
                                       eb, found_level);
 
        ret = csum_tree_block(fs_info, eb, 1);
-       if (ret) {
-               ret = -EIO;
+       if (ret)
                goto err;
-       }
 
        /*
         * If this is a leaf block and it is corrupt, set the corrupt bit so