On Thu, 29 Jan 2026 23:28:21 +0100 Daniel Borkmann wrote:

- * Get dma device for zero-copy operations to be used for this queue.
+ * Get dma device for zero-copy operations to be used for this queue. If the
+ * queue is leased to a physical queue, we retrieve the latter's dma device.
  * When such device is not available or valid, the function will return NULL.
  *
  * Return: Device or NULL on error
  */
 struct device *netdev_queue_get_dma_dev(struct net_device *dev, int idx)
 {
-	const struct netdev_queue_mgmt_ops *queue_ops = dev->queue_mgmt_ops;
+	const struct netdev_queue_mgmt_ops *queue_ops;
 	struct device *dma_dev;
 
+	if (idx < dev->real_num_rx_queues) {
+		struct netdev_rx_queue *rxq = __netif_get_rx_queue(dev, idx);
+
+		if (rxq->lease) {
+			rxq = rxq->lease;
+			dev = rxq->dev;
+			idx = get_netdev_rx_queue_index(rxq);
+		}
+	}
+
+	queue_ops = dev->queue_mgmt_ops;

We're gonna call physical device's op without locking it no?