From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8DCB1C04AB4 for ; Fri, 17 May 2019 21:02:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 67AE32166E for ; Fri, 17 May 2019 21:02:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729457AbfEQVCl (ORCPT ); Fri, 17 May 2019 17:02:41 -0400 Received: from mx0b-002e3701.pphosted.com ([148.163.143.35]:37874 "EHLO mx0b-002e3701.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729408AbfEQVCi (ORCPT ); Fri, 17 May 2019 17:02:38 -0400 Received: from pps.filterd (m0134425.ppops.net [127.0.0.1]) by mx0b-002e3701.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x4HL0nJM012571; Fri, 17 May 2019 21:02:08 GMT Received: from g2t2354.austin.hpe.com (g2t2354.austin.hpe.com [15.233.44.27]) by mx0b-002e3701.pphosted.com with ESMTP id 2sj1f516rs-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 17 May 2019 21:02:08 +0000 Received: from g2t2360.austin.hpecorp.net (g2t2360.austin.hpecorp.net [16.196.225.135]) by g2t2354.austin.hpe.com (Postfix) with ESMTP id 7859EB5; Fri, 17 May 2019 21:02:07 +0000 (UTC) Received: from lxbuild.ftc.rdlabs.hpecorp.net (lxbuild.ftc.rdlabs.hpecorp.net [16.78.34.175]) by g2t2360.austin.hpecorp.net (Postfix) with ESMTP id 2BE1537; Fri, 17 May 2019 21:02:07 +0000 (UTC) From: Jerry Hoemann To: linux@roeck-us.net, wim@linux-watchdog.org, linux-watchdog@vger.kernel.org Cc: linux-kernel@vger.kernel.org, mironov.ivan@gmail.com, rasmus.villemoes@prevas.dk, jerry.hoemann@hpe.com Subject: [PATCH 3/6] watchdog/hpwdt: Have core ping watchdog. Date: Fri, 17 May 2019 14:59:40 -0600 Message-Id: <1558126783-4877-4-git-send-email-jerry.hoemann@hpe.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1558126783-4877-1-git-send-email-jerry.hoemann@hpe.com> References: <1558126783-4877-1-git-send-email-jerry.hoemann@hpe.com> X-HPE-SCL: -1 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-05-17_13:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=792 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1905170125 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of stopping the hw timer during probe, have the core update the timer if the timer is already running. Signed-off-by: Jerry Hoemann --- drivers/watchdog/hpwdt.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index 9f7a370..aa4101c 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -59,6 +59,11 @@ /* * Watchdog operations */ +static int hpwdt_hw_is_running(void) +{ + return ioread8(hpwdt_timer_con) & 0x01; +} + static int hpwdt_start(struct watchdog_device *wdd) { int control = 0x81 | (pretimeout ? 0x4 : 0); @@ -302,8 +307,11 @@ static int hpwdt_init_one(struct pci_dev *dev, hpwdt_timer_reg = pci_mem_addr + 0x70; hpwdt_timer_con = pci_mem_addr + 0x72; - /* Make sure that timer is disabled until /dev/watchdog is opened */ - hpwdt_stop(); + /* Have the core update running timer until user space is ready */ + if (hpwdt_hw_is_running()) { + dev_info(&dev->dev, "timer is running\n"); + set_bit(WDOG_HW_RUNNING, &hpwdt_dev.status); + } /* Initialize NMI Decoding functionality */ retval = hpwdt_init_nmi_decoding(dev); -- 1.8.3.1