port: return explicit error when requesting too many rxqs

Unlike TX queues which are silently capped to the device maximum, RX
queues are explicitly requested by the user. Return EOVERFLOW if the
requested count exceeds what the device supports.

Signed-off-by: Robin Jarry <rjarry@redhat.com>

Author: rjarry

modules/infra/control/port.c

@@ -97,6 +97,9 @@ int port_configure(struct iface_info_port *p, uint16_t n_txq_min) {
 	if (p->n_rxq == 0)
 		p->n_rxq = 1;
 
+	if (p->n_rxq > info.max_rx_queues)
+		return errno_set(EOVERFLOW);
+
 	// cap number of queues to device maximum
 	p->n_txq = RTE_MIN(n_txq_min, info.max_tx_queues);