Merge branch 'stable/for-jens' into linux-next

Merge branch 'stable/for-jens' into linux-next

* stable/for-jens:
  xen-blkback: fixed indentation and comments
  xen-blkback: sync I/O after backend disconnected
  xen-blkback: Don't disconnect backend until state switched to XenbusStateClosed.
  xen/blk[front|back]: Use the full FLUSH | FUA instead of just FLUSH.
  xen/blkback: Make description more obvious.
  xen-blkfront: Fix one off warning about name clash
  xen-blkfront: Drop name and minor adjustments for emulated scsi devices