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s390/vfio-ap: Ignore duplicate link requests in vfio_ap_mdev_link_queue

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vfio_ap_mdev_link_queue is changed to detect if a matrix_mdev has
already linked the given queue. If so, it bails out.

Signed-off-by: "Jason J. Herne" <jjherne@linux.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Link: https://lore.kernel.org/r/20240415152555.13152-4-jjherne@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Jason J. Herne
2024-04-15 11:25:53 -04:00
committed by Alexander Gordeev
parent e12aa0b5b2
commit f3e3a4008c
1 changed files with 5 additions and 4 deletions
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drivers/s390/crypto/vfio_ap_ops.c
+5 -4
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@@ -794,10 +794,11 @@ err_put_vdev:
static void vfio_ap_mdev_link_queue(struct ap_matrix_mdev *matrix_mdev,
struct vfio_ap_queue *q)
{
if (q) {
q->matrix_mdev = matrix_mdev;
hash_add(matrix_mdev->qtable.queues, &q->mdev_qnode, q->apqn);
}
if (!q || vfio_ap_mdev_get_queue(matrix_mdev, q->apqn))
return;
q->matrix_mdev = matrix_mdev;
hash_add(matrix_mdev->qtable.queues, &q->mdev_qnode, q->apqn);
}
static void vfio_ap_mdev_link_apqn(struct ap_matrix_mdev *matrix_mdev, int apqn)