These can simply be the size of the number of sectors we're reading,
plus one for a buffer. We don't need them to be any larger.
Signed-off-by: NJohn Snow <jsnow@redhat.com>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>
Message-id: 1477970211-25754-3-git-send-email-jsnow@redhat.com
Signed-off-by: NJohn Snow <jsnow@redhat.com>