Subject: [PATCH net-next 12/16] tilegx: Don't receive packets when the napi budget == 0

From: [email-masked] (Eric W. Biederman)
Date: Fri, 14 Mar 2014 18:08:21 -0700

Processing any incoming packets with a with a napi budget of 0
is incorrect driver behavior.

This matters as netpoll will shortly call drivers with a budget of 0
to avoid receive packet processing happening in hard irq context.

Signed-off-by: "Eric W. Biederman" <[email-masked]>
---
 drivers/net/ethernet/tile/tilegx.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/tile/tilegx.c b/drivers/net/ethernet/tile/tilegx.c
index 17503da9f7a5..b43f1b3b9632 100644
--- a/drivers/net/ethernet/tile/tilegx.c
+++ b/drivers/net/ethernet/tile/tilegx.c
@@ -659,6 +659,9 @@ static int tile_net_poll(struct napi_struct *napi, int budget)
 	struct info_mpipe *info_mpipe =
 		container_of(napi, struct info_mpipe, napi);
 
+	if (budget <= 0)
+		goto done;
+
 	instance = info_mpipe->instance;
 	while ((n = gxio_mpipe_iqueue_try_peek(
 			&info_mpipe->iqueue,
-- 
1.7.5.4