From patchwork Mon Oct 9 04:40:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bharat Bhushan X-Patchwork-Id: 731897 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60D22E95A99 for ; Mon, 9 Oct 2023 04:41:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345068AbjJIElE (ORCPT ); Mon, 9 Oct 2023 00:41:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229599AbjJIElC (ORCPT ); Mon, 9 Oct 2023 00:41:02 -0400 Received: from mx0b-0016f401.pphosted.com (mx0b-0016f401.pphosted.com [67.231.156.173]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8AAEDA6; Sun, 8 Oct 2023 21:41:01 -0700 (PDT) Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 398Nn9vR001402; Sun, 8 Oct 2023 21:40:44 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=pfpt0220; bh=uuIo5XIor/wjVh0dvrOlKs3utXBrgZ7EaOP9tSaS5x8=; b=VCzAjk2kTFWnsK10/pF6EgAnpvTI3dqpLuB50W+kNpH8p5E1QXj87iFupsejXhLihahw 1YNEchwtJazPGjQRpCBa2c81yhwFmVqsjmk7yvS0lvq8QcSpI51caWOaEGYAKx9XFwqG 0WXFDcFKlBWHpv3HsDep1b5p1ugCYqTQBtjixzDVg0ckjlBbO3lRPZqyrnlV72hPP92U J9n3Xx8LaDShRbxk+bQxT/gZSB8BSQdaY+pXNwwPszM5maaWX4cNY7gF0xXVi2NDdXDD Z2DsSmBUgrwvGRIyyp5lkhTqSwaGx0/qUGOBXMIUoD6jIQxtRg3RtfYdoxnZ58v/JOz+ JQ== Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0b-0016f401.pphosted.com (PPS) with ESMTPS id 3tkh7caxpd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Sun, 08 Oct 2023 21:40:44 -0700 Received: from DC5-EXCH02.marvell.com (10.69.176.39) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Sun, 8 Oct 2023 21:40:42 -0700 Received: from bharat-OptiPlex-3070.marvell.com (10.69.176.80) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server id 15.0.1497.48 via Frontend Transport; Sun, 8 Oct 2023 21:40:40 -0700 From: Bharat Bhushan To: , , , CC: Bharat Bhushan Subject: [PATCH 1/2] drivers: watchdog: marvell_gti: fix zero pretimeout handling Date: Mon, 9 Oct 2023 10:10:36 +0530 Message-ID: <20231009044037.514570-1-bbhushan2@marvell.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Proofpoint-GUID: q5ADRS9OT7OBc5vrGjQku54tNrjeuH8z X-Proofpoint-ORIG-GUID: q5ADRS9OT7OBc5vrGjQku54tNrjeuH8z X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-09_03,2023-10-06_01,2023-05-22_02 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org When pretimeout is set to 0 then do not reprogram timer with zero timeout, this will reset device immediately. Also disable interrupt to stop pretimeout notification. Signed-off-by: Bharat Bhushan Reviewed-by: Guenter Roeck --- drivers/watchdog/marvell_gti_wdt.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/watchdog/marvell_gti_wdt.c b/drivers/watchdog/marvell_gti_wdt.c index d7eb8286e11e..25b7ce0f0738 100644 --- a/drivers/watchdog/marvell_gti_wdt.c +++ b/drivers/watchdog/marvell_gti_wdt.c @@ -190,6 +190,13 @@ static int gti_wdt_set_pretimeout(struct watchdog_device *wdev, struct gti_wdt_priv *priv = watchdog_get_drvdata(wdev); struct watchdog_device *wdog_dev = &priv->wdev; + if (!timeout) { + /* Disable Interrupt */ + writeq(GTI_CWD_INT_ENA_CLR_VAL(priv->wdt_timer_idx), + priv->base + GTI_CWD_INT_ENA_CLR); + return 0; + } + /* pretimeout should 1/3 of max_timeout */ if (timeout * 3 <= wdog_dev->max_timeout) return gti_wdt_settimeout(wdev, timeout * 3);