From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm@xmission.com (Eric W. Biederman) Subject: [PATCH net-next 13/16] tilepro: Don't receive packets when the napi budget == 0 Date: Fri, 14 Mar 2014 18:09:01 -0700 Message-ID: <871ty4xo7m.fsf_-_@xmission.com> References: <87a9cxf7mp.fsf_-_@xmission.com> <20140311.124907.1180556684992271103.davem@davemloft.net> <87wqg0cy9d.fsf@xmission.com> <20140311.160931.1395978386605601765.davem@davemloft.net> <877g808luk.fsf_-_@xmission.com> <871ty41dps.fsf_-_@xmission.com> Mime-Version: 1.0 Content-Type: text/plain Cc: eric.dumazet@gmail.com, netdev@vger.kernel.org, xiyou.wangcong@gmail.com, mpm@selenic.com, satyam.sharma@gmail.com To: David Miller Return-path: Received: from out03.mta.xmission.com ([166.70.13.233]:35864 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754667AbaCOBJH (ORCPT ); Fri, 14 Mar 2014 21:09:07 -0400 In-Reply-To: <871ty41dps.fsf_-_@xmission.com> (Eric W. Biederman's message of "Fri, 14 Mar 2014 17:56:47 -0700") Sender: netdev-owner@vger.kernel.org List-ID: 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" --- 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