s390/vfio_ap: verify ZAPQ completion after return of response code zero

s390/vfio_ap: verify ZAPQ completion after return of response code zero

Verification that the asynchronous ZAPQ function has completed only needs
to be done when the response code indicates the function was successfully
initiated; so, let's call the apq_reset_check function immediately after
the response code zero is returned from the ZAPQ.

Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Link: https://lore.kernel.org/r/20230118203111.529766-5-akrowiak@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>