[PATCH v3 2/2] s390/vfio-ap: fix unlinking of queues from the mdev

[Tony Krowiak]

The vfio_ap_mdev_unlink_adapter and vfio_ap_mdev_unlink_domain functions
add the associated vfio_ap_queue objects to the hashtable that links them
to the matrix mdev to which their APQN is assigned. In order to unlink
them, they must be deleted from the hashtable; if not, they will continue
to be reset whenever userspace closes the mdev fd or removes the mdev.
This patch fixes that issue.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 70aeefe574cb ("s390/vfio-ap: reset queues after adapter/domain unassignment")
Reported-by: Tony Krowiak <akrowiak@xxxxxxxxxxxxx>
Signed-off-by: Tony Krowiak <akrowiak@xxxxxxxxxxxxx>
---
 drivers/s390/crypto/vfio_ap_ops.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index ee82207b4e60..2493926b5dfb 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -1049,8 +1049,7 @@ static void vfio_ap_mdev_unlink_adapter(struct ap_matrix_mdev *matrix_mdev,
 		if (q && qtable) {
 			if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
 			    test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm))
-				hash_add(qtable->queues, &q->mdev_qnode,
-					 q->apqn);
+				vfio_ap_unlink_queue_fr_mdev(q);
 		}
 	}
 }
@@ -1236,8 +1235,7 @@ static void vfio_ap_mdev_unlink_domain(struct ap_matrix_mdev *matrix_mdev,
 		if (q && qtable) {
 			if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
 			    test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm))
-				hash_add(qtable->queues, &q->mdev_qnode,
-					 q->apqn);
+				vfio_ap_unlink_queue_fr_mdev(q);
 		}
 	}
 }
-- 
2.31.1