Commit f3e3a400 authored by Jason J. Herne's avatar Jason J. Herne Committed by Alexander Gordeev
Browse files

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



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: default avatar"Jason J. Herne" <jjherne@linux.ibm.com>
Reviewed-by: default avatarTony Krowiak <akrowiak@linux.ibm.com>
Link: https://lore.kernel.org/r/20240415152555.13152-4-jjherne@linux.ibm.com


Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
parent e12aa0b5

drivers/s390/crypto/vfio_ap_ops.c

+5 −4
Original line number Diff line number Diff line
@@ -794,11 +794,12 @@ static int vfio_ap_mdev_probe(struct mdev_device *mdev) 
static void vfio_ap_mdev_link_queue(struct ap_matrix_mdev *matrix_mdev,

				    struct vfio_ap_queue *q)

{

	if (q) {

	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)

{