sfc: commonise netif_set_real_num[tr]x_queues calls

While we're at it, also check them for failure.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sfc/efx.c

@@ -336,9 +336,6 @@ static int efx_probe_nic(struct efx_nic *efx)
 				    sizeof(efx->rss_context.rx_hash_key));
 	efx_set_default_rx_indir_table(efx, &efx->rss_context);
 
-	netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels);
-	netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels);
-
 	/* Initialise the interrupt moderation settings */
 	efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);
 	efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,

drivers/net/ethernet/sfc/efx_channels.c

@@ -856,6 +856,7 @@ int efx_set_channels(struct efx_nic *efx)
 	struct efx_channel *channel;
 	struct efx_tx_queue *tx_queue;
 	int xdp_queue_number;
+	int rc;
 
 	efx->tx_channel_offset =
 		efx_separate_tx_channels ?
@@ -894,7 +895,11 @@ int efx_set_channels(struct efx_nic *efx)
 			}
 		}
 	}
-	return 0;
+
+	rc = netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels);
+	if (rc)
+		return rc;
+	return netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels);
 }
 
 bool efx_default_channel_want_txqs(struct efx_channel *channel)