drivers: net: generalize napi_complete_done()

napi_complete_done() allows to opt-in for gro_flush_timeout,
added back in linux-3.19, commit 3b47d30396ba
("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>
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index c1b6716..d0ebab7 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -3183,7 +3183,7 @@ static int gfar_poll_rx_sq(struct napi_struct *napi, int budget)
 
 	if (work_done < budget) {
 		u32 imask;
-		napi_complete(napi);
+		napi_complete_done(napi, work_done);
 		/* Clear the halt bit in RSTAT */
 		gfar_write(&regs->rstat, gfargrp->rstat);
 
@@ -3272,7 +3272,7 @@ static int gfar_poll_rx(struct napi_struct *napi, int budget)
 
 	if (!num_act_queues) {
 		u32 imask;
-		napi_complete(napi);
+		napi_complete_done(napi, work_done);
 
 		/* Clear the halt bit in RSTAT */
 		gfar_write(&regs->rstat, gfargrp->rstat);