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btrfs: fix dereference of ERR_PTR value

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smatch reports:

btrfs_recover_log_trees error: 'wc.replay_dest' dereferencing
possible ERR_PTR()

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
David Sterba 2011-06-13 17:54:22 +00:00 committed by Chris Mason
parent e038dca803
commit 3ed4498caf
1 changed files with 1 additions and 1 deletions
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fs/btrfs/tree-log.c
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@ -3177,7 +3177,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
tmp_key.offset = (u64)-1; tmp_key.offset = (u64)-1;
wc.replay_dest = btrfs_read_fs_root_no_name(fs_info, &tmp_key); wc.replay_dest = btrfs_read_fs_root_no_name(fs_info, &tmp_key);
BUG_ON(!wc.replay_dest); BUG_ON(IS_ERR_OR_NULL(wc.replay_dest));
wc.replay_dest->log_root = log; wc.replay_dest->log_root = log;
btrfs_record_root_in_trans(trans, wc.replay_dest); btrfs_record_root_in_trans(trans, wc.replay_dest);