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Herne" To: linux-s390@vger.kernel.org Cc: linux-kernel@vger.kernel.org, pasic@linux.ibm.com, akrowiak@linux.ibm.com, borntraeger@de.ibm.com, agordeev@linux.ibm.com, gor@linux.ibm.com Subject: [PATCH v3 3/5] s390/vfio-ap: Ignore duplicate link requests in vfio_ap_mdev_link_queue Date: Wed, 13 Mar 2024 16:58:05 -0400 Message-ID: <20240313205807.30554-4-jjherne@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240313205807.30554-1-jjherne@linux.ibm.com> References: <20240313205807.30554-1-jjherne@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: W0uojsw1S5QvGbUSieI5qg1r8ccupXKd X-Proofpoint-GUID: W0uojsw1S5QvGbUSieI5qg1r8ccupXKd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-03-13_09,2024-03-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 bulkscore=0 spamscore=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 mlxlogscore=999 mlxscore=0 malwarescore=0 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2403130160 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 Reviewed-by: Tony Krowiak --- 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