[GIT PULL 14/22] s390/vfio-ap: handle queue state change in progress on reset

Janosch Frank
2023-08-24T12:47:31Z

From: Tony Krowiak <akrowiak@linux.ibm.com>

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: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Tested-by: Viktor Mihajlovski <mihajlov@linux.ibm.com>
Link: https://lore.kernel.org/r/20230815184333.6554-9-akrowiak@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
drivers/s390/crypto/vfio_ap_ops.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index 3a59f1c5390f..43dea259fe23 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -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.
*/
--
2.41.0