net: renesas: rswitch: Fix unmasking irq condition

Fix unmasking irq condition by using napi_complete_done(). Otherwise,
redundant interrupts happen.

Fixes: 3590918 ("net: ethernet: renesas: Add support for "Ethernet Switch"")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: shimoday

drivers/net/ethernet/renesas/rswitch.c

@@ -816,10 +816,10 @@ static int rswitch_poll(struct napi_struct *napi, int budget)
 
 	netif_wake_subqueue(ndev, 0);
 
-	napi_complete(napi);
-
-	rswitch_enadis_data_irq(priv, rdev->tx_queue->index, true);
-	rswitch_enadis_data_irq(priv, rdev->rx_queue->index, true);
+	if (napi_complete_done(napi, budget - quota)) {
+		rswitch_enadis_data_irq(priv, rdev->tx_queue->index, true);
+		rswitch_enadis_data_irq(priv, rdev->rx_queue->index, true);
+	}
 
 out:
 	return budget - quota;