btrfs: use single variable to track return value at btrfs_log_inode()
At btrfs_log_inode(), we have two variables to track errors and the return value of the function, named 'ret' and 'err'. In some places we use 'ret' and if gets a non-zero value we assign its value to 'err' and then jump to the 'out' label, while in other places we use 'err' directly without 'ret' as an intermediary. This is inconsistent, error prone and not necessary. So change that to use only the 'ret' variable, making this consistent with most functions in btrfs. Signed-off-by: NFilipe Manana <fdmanana@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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