The following patches were made over Linus tree (Martin's 6.7 branch was missing some changes to sd.c). They only contain the sshdr and rdac retry fixes from the "Allow scsi_execute users to control retries" patchset. The patches in this set are reviewed and tested but the changes to how we do retries will take a little longer and require more testing, so I broke up the series to make them easier to review.
