Subject: [PATCH net-next 13/16] tilepro: Don't receive packets when the napi budget == 0

From: [email-masked] (Eric W. Biederman)
Date: Fri, 14 Mar 2014 18:09:01 -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/tilepro.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/tile/tilepro.c b/drivers/net/ethernet/tile/tilepro.c
index edb2e12a0fe2..44b186aa932c 100644
--- a/drivers/net/ethernet/tile/tilepro.c
+++ b/drivers/net/ethernet/tile/tilepro.c
@@ -831,6 +831,9 @@ static int tile_net_poll(struct napi_struct *napi, int budget)
 
 	unsigned int work = 0;
 
+	if (budget <= 0)
+		goto done;
+
 	while (priv->active) {
 		int index = qup->__packet_receive_read;
 		if (index == qsp->__packet_receive_queue.__packet_write)
-- 
1.7.5.4