Comment 16 for bug 874774

TJ, I've also just noticed that this patch does *not* address the original bug here. Your patch addresses the case where a source device is handled through devmapper (such as an LVM volume), but that is *not* the case in the original report; when the installer sets up crypted swap, the source device is a physical partition, which should already work fine.

This is still worth fixing anyway; please give the attached patch a try.