From 176f792f571ffef6d86b4254424cc05bb3874c9e Mon Sep 17 00:00:00 2001
From: "Eric W. Biederman" <ebiederm@xmission.com>
Date: Fri, 14 Mar 2014 18:10:14 -0700
Subject: [PATCH] tc35815: Don't receive packets when the napi budget == 0
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" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/toshiba/tc35815.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/toshiba/tc35815.c b/drivers/net/ethernet/toshiba/tc35815.c
index 88e9c73cebc01..fef5573dbfcac 100644
--- a/drivers/net/ethernet/toshiba/tc35815.c
+++ b/drivers/net/ethernet/toshiba/tc35815.c
@@ -1645,6 +1645,9 @@ static int tc35815_poll(struct napi_struct *napi, int budget)
int received = 0, handled;
u32 status;
+ if (budget <= 0)
+ return received;
+
spin_lock(&lp->rx_lock);
status = tc_readl(&tr->Int_Src);
do {
--
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