From: Jens Axboe <axboe@suse.de>

cdrom_has_defect_mgt() has the same ->data_len bug - the length field is
not total length, but the length following that field.  So it should be +
4, not + 8.  However, just kill the length check.  Comparison of
feature_code provides enough check.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>