Commit f820c0ac authored Feb 06, 2017 by Bert Kenward Committed by David S. Miller Feb 06, 2017

sfc: don't rearm interrupts if busy polling



Since commit 364b6055 ("net: busy-poll: return busypolling status
to drivers"), napi_complete_done() returns a boolean that can be used
by drivers to conditionally rearm interrupts.

Testing with a 7142 shows a small latency improvement of ~100 ns.

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

parent d15c9ede

drivers/net/ethernet/sfc/efx.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -328,7 +328,7 @@ static int efx_poll(struct napi_struct *napi, int budget)
		* since efx_nic_eventq_read_ack() will have no effect if
		* interrupts have already been disabled.
		*/
		napi_complete_done(napi, spent);
		if (napi_complete_done(napi, spent))
		efx_nic_eventq_read_ack(channel);
		}