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Btrfs: check return value of read_tree_block()

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This patch is checking return value of read_tree_block(),
and if it is NULL, error processing.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Tsutomu Itoh
2011-03-24 06:33:21 +00:00
committed by root
parent 7e75bf3ff3
commit 97d9a8a420
3 changed files with 15 additions and 0 deletions
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3
fs/btrfs/ctree.c
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@@ -682,6 +682,8 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
if (!cur) {
cur = read_tree_block(root, blocknr,
blocksize, gen);
if (!cur)
return -EIO;
} else if (!uptodate) {
btrfs_read_buffer(cur, gen);
}
@@ -4087,6 +4089,7 @@ find_next_key:
}
btrfs_set_path_blocking(path);
cur = read_node_slot(root, cur, slot);
BUG_ON(!cur);
btrfs_tree_lock(cur);