From: Dave Kleikamp <shaggy@austin.ibm.com>

After Jose debugged the problem down to the routine jfs_get_parent, we
were able to find the problem.  I believe it only affects users of
NFS-exported JFS file systems on big-endian hardware.

The problem was a missing le32_to_cpu macro.  The patch also fixes a
return code to be more consistent other implementations of get_parent.