Return-path: Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:55379 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750793AbaIYGR7 (ORCPT ); Thu, 25 Sep 2014 02:17:59 -0400 From: Avinash Patil To: CC: , , , , , , Avinash Patil , Kevin Gan Subject: [PATCH 1/3] mwifiex: fix soft lockup during iperf UDP RX Date: Thu, 25 Sep 2014 17:16:40 +0530 Message-ID: <1411645602-18980-1-git-send-email-patila@marvell.com> (sfid-20140925_081802_626620_5FAC74D2) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-wireless-owner@vger.kernel.org List-ID: A soft lockup was observed on ARM multicore platform while UDP RX iperf was running on station. Reason for this is delay_main_task was not taken into consideration while jumping to process_start. Now if delay_main_task is true, we would exit mwifiex_main_process instead of going to process_start again. This ensure other process is scheduled on this CPU and soft lockup is avoided. Signed-off-by: Amitkumar Karwar Signed-off-by: Kevin Gan Signed-off-by: Marc Yang Signed-off-by: Avinash Patil Signed-off-by: Cathy Luo --- drivers/net/wireless/mwifiex/main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c index b522f7c..be52189 100644 --- a/drivers/net/wireless/mwifiex/main.c +++ b/drivers/net/wireless/mwifiex/main.c @@ -330,7 +330,8 @@ process_start: } while (true); spin_lock_irqsave(&adapter->main_proc_lock, flags); - if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) { + if (!adapter->delay_main_work && + (adapter->int_status || IS_CARD_RX_RCVD(adapter))) { spin_unlock_irqrestore(&adapter->main_proc_lock, flags); goto process_start; } -- 1.8.1.4