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Message-ID: <20240415152555.13152-4-jjherne@linux.ibm.com>
Date: Mon, 15 Apr 2024 11:25:53 -0400
From: "Jason J. Herne" <jjherne@...ux.ibm.com>
To: linux-s390@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, pasic@...ux.ibm.com, akrowiak@...ux.ibm.com,
borntraeger@...ibm.com, agordeev@...ux.ibm.com, gor@...ux.ibm.com,
hca@...ux.ibm.com
Subject: [PATCH v5 3/5] 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: Jason J. Herne <jjherne@...ux.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@...ux.ibm.com>
---
drivers/s390/crypto/vfio_ap_ops.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index e01f53a3c5b7..1499c2181122 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -794,10 +794,11 @@ 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) {
- 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)
--
2.41.0
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