- cleanup scsi_end_request() documentation
   - shorten path for block SG_IO through scsi_io_completion()
   - for non-SG_IO sense processing in scsi_io_completion():
      - ignore deferred errors (report + retry should suffice)
      - consolidate into a cleaner switch statement
Signed-off-by: Douglas Gilbert <dougg@torque.net>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>