drivers: net: generalize napi_complete_done()

napi_complete_done() allows to opt-in for gro_flush_timeout,
added back in linux-3.19, commit 3b47d30396
("net: gro: add a per device gro flush timer")

This allows for more efficient GRO aggregation without
sacrifying latencies.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sun/niu.c

@@ -3786,7 +3786,7 @@ static int niu_poll(struct napi_struct *napi, int budget)
 	work_done = niu_poll_core(np, lp, budget);
 
 	if (work_done < budget) {
-		napi_complete(napi);
+		napi_complete_done(napi, work_done);
 		niu_ldg_rearm(np, lp, 1);
 	}
 	return work_done;

drivers/net/ethernet/sun/sungem.c

@@ -922,7 +922,7 @@ static int gem_poll(struct napi_struct *napi, int budget)
 		gp->status = readl(gp->regs + GREG_STAT);
 	} while (gp->status & GREG_STAT_NAPI);
 
-	napi_complete(napi);
+	napi_complete_done(napi, work_done);
 	gem_enable_ints(gp);
 
 	return work_done;

drivers/net/ethernet/sun/sunvnet_common.c

@@ -860,7 +860,7 @@ int sunvnet_poll_common(struct napi_struct *napi, int budget)
 	int processed = vnet_event_napi(port, budget);
 
 	if (processed < budget) {
-		napi_complete(napi);
+		napi_complete_done(napi, processed);
 		port->rx_event &= ~LDC_EVENT_DATA_READY;
 		vio_set_intr(vio->vdev->rx_ino, HV_INTR_ENABLED);
 	}