From patchwork Wed Jan 2 14:22:38 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arend van Spriel X-Patchwork-Id: 1923771 Return-Path: X-Original-To: patchwork-linux-wireless@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id B8E2B3FC85 for ; Wed, 2 Jan 2013 14:23:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752735Ab3ABOXH (ORCPT ); Wed, 2 Jan 2013 09:23:07 -0500 Received: from mms3.broadcom.com ([216.31.210.19]:3914 "EHLO mms3.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752762Ab3ABOXD (ORCPT ); Wed, 2 Jan 2013 09:23:03 -0500 Received: from [10.9.200.133] by mms3.broadcom.com with ESMTP (Broadcom SMTP Relay (Email Firewall v6.5)); Wed, 02 Jan 2013 06:18:01 -0800 X-Server-Uuid: B86B6450-0931-4310-942E-F00ED04CA7AF Received: from mail-irva-13.broadcom.com (10.11.16.103) by IRVEXCHHUB02.corp.ad.broadcom.com (10.9.200.133) with Microsoft SMTP Server id 8.2.247.2; Wed, 2 Jan 2013 06:22:45 -0800 Received: from mail-sj1-12.sj.broadcom.com (mail-sj1-12.sj.broadcom.com [10.17.16.106]) by mail-irva-13.broadcom.com (Postfix) with ESMTP id BBA4E40FE3; Wed, 2 Jan 2013 06:22:57 -0800 (PST) Received: from linux-e6410-1 (unknown [10.176.68.32]) by mail-sj1-12.sj.broadcom.com (Postfix) with ESMTP id 16118207D0; Wed, 2 Jan 2013 06:22:54 -0800 (PST) Received: from arend by linux-e6410-1 with local (Exim 4.80) ( envelope-from ) id 1TqPDa-0004lz-11; Wed, 02 Jan 2013 15:22:54 +0100 From: "Arend van Spriel" To: "John W. Linville" cc: "Linux Wireless List" , "Hante Meuleman" , "Arend van Spriel" Subject: [PATCH 05/18] brcmfmac: do not reconfigure refill rx on 0-length packet. Date: Wed, 2 Jan 2013 15:22:38 +0100 Message-ID: <1357136572-18273-6-git-send-email-arend@broadcom.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1357136572-18273-1-git-send-email-arend@broadcom.com> References: <1357136572-18273-1-git-send-email-arend@broadcom.com> MIME-Version: 1.0 X-WSS-ID: 7CFA9E1339W21354695-01-01 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Hante Meuleman When USB device gets removed rx complete comes with 0-length packets. Do not refill those packets. In some rare cases it can cause infinite loop. Reviewed-by: Arend Van Spriel Reviewed-by: Pieter-Paul Giesberts Signed-off-by: Hante Meuleman Signed-off-by: Arend van Spriel --- drivers/net/wireless/brcm80211/brcmfmac/usb.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/usb.c b/drivers/net/wireless/brcm80211/brcmfmac/usb.c index 914c56f..22eae57 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/usb.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/usb.c @@ -467,7 +467,11 @@ static void brcmf_usb_rx_complete(struct urb *urb) devinfo->bus_pub.bus->dstats.rx_errors++; } else brcmf_rx_packet(devinfo->dev, ifidx, skb); - brcmf_usb_rx_refill(devinfo, req); + /* zero lenght packets indicate usb "failure". Do not refill */ + if (urb->actual_length) + brcmf_usb_rx_refill(devinfo, req); + else + brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL); } else { brcmu_pkt_buf_free_skb(skb); brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);