Commit e1f17f8e authored by Tony Krowiak's avatar Tony Krowiak Committed by Heiko Carstens
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s390/vfio-ap: handle queue state change in progress on reset 



A new APQSW response code (0xA) indicating the designated queue is in the
process of being bound or associated to a configuration may be returned
from the PQAP(ZAPQ) command. This patch introduces code that will verify
when the PQAP(ZAPQ) command can be re-issued after receiving response code
0xA.

Signed-off-by: default avatarTony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: default avatarJason J. Herne <jjherne@linux.ibm.com>
Acked-by: default avatarHalil Pasic <pasic@linux.ibm.com>
Tested-by: default avatarViktor Mihajlovski <mihajlov@linux.ibm.com>
Link: https://lore.kernel.org/r/20230815184333.6554-9-akrowiak@linux.ibm.com


Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 9261f043

drivers/s390/crypto/vfio_ap_ops.c

+3 −1
Original line number Diff line number Diff line
@@ -1647,7 +1647,8 @@ static void apq_reset_check(struct work_struct *reset_work) 
					      status.irq_enabled);

		} else {

			if (q->reset_status.response_code == AP_RESPONSE_RESET_IN_PROGRESS ||

			    q->reset_status.response_code == AP_RESPONSE_BUSY) {

			    q->reset_status.response_code == AP_RESPONSE_BUSY ||

			    q->reset_status.response_code == AP_RESPONSE_STATE_CHANGE_IN_PROGRESS) {

				status = ap_zapq(q->apqn, 0);

				memcpy(&q->reset_status, &status, sizeof(status));

				continue;
@@ -1679,6 +1680,7 @@ static void vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q) 
	case AP_RESPONSE_NORMAL:

	case AP_RESPONSE_RESET_IN_PROGRESS:

	case AP_RESPONSE_BUSY:

	case AP_RESPONSE_STATE_CHANGE_IN_PROGRESS:

		/*

		 * Let's verify whether the ZAPQ completed successfully on a work queue.

		 */