commit cfc05bd3 upstream.

Service thread does not detect the need for taskfile error hanlding. Fixed the
flag condition to process taskfile error.
Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>