From: Dragos Tatulea dtatulea@nvidia.com
[ Upstream commit fe37efba475375caa2dbc71cb06f53f7086277ef ]
The referenced patch calls set_vq_affinity without checking if the op is valid. This patch adds the check.
Fixes: 3dad56823b53 ("virtio-vdpa: Support interrupt affinity spreading mechanism") Reviewed-by: Gal Pressman gal@nvidia.com Signed-off-by: Dragos Tatulea dtatulea@nvidia.com Message-Id: 20230504135053.2283816-1-dtatulea@nvidia.com Signed-off-by: Michael S. Tsirkin mst@redhat.com Reviewed-by: Feng Liu feliu@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/virtio/virtio_vdpa.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index eb6aee8c06b2c..989e2d7184ce4 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -385,7 +385,9 @@ static int virtio_vdpa_find_vqs(struct virtio_device *vdev, unsigned int nvqs, err = PTR_ERR(vqs[i]); goto err_setup_vq; } - ops->set_vq_affinity(vdpa, i, &masks[i]); + + if (ops->set_vq_affinity) + ops->set_vq_affinity(vdpa, i, &masks[i]); }
cb.callback = virtio_vdpa_config_cb;