From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756026AbaISGcn (ORCPT ); Fri, 19 Sep 2014 02:32:43 -0400 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:57232 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751046AbaISGcl (ORCPT ); Fri, 19 Sep 2014 02:32:41 -0400 From: Jisheng Zhang To: , CC: , , , Jisheng Zhang Subject: [PATCH 1/2] watchdog: dw_wdt: restart the counter immediately after enabling WDT Date: Fri, 19 Sep 2014 14:29:58 +0800 Message-ID: <1411108199-1280-2-git-send-email-jszhang@marvell.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1411108199-1280-1-git-send-email-jszhang@marvell.com> References: <1411108199-1280-1-git-send-email-jszhang@marvell.com> MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.12.52,1.0.28,0.0.0000 definitions=2014-09-19_04:2014-09-18,2014-09-19,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1402240000 definitions=main-1409190062 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The TOP_INIT may be zero, so the timeout period may be very short after initialization is done, thus the system may be reset soon after enabling. We fix this problem by restarting the counter immediately after enabling WDT. Signed-off-by: Jisheng Zhang --- drivers/watchdog/dw_wdt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c index 9f21029..ad0619d 100644 --- a/drivers/watchdog/dw_wdt.c +++ b/drivers/watchdog/dw_wdt.c @@ -146,6 +146,7 @@ static int dw_wdt_open(struct inode *inode, struct file *filp) dw_wdt_set_top(DW_WDT_MAX_TOP); writel(WDOG_CONTROL_REG_WDT_EN_MASK, dw_wdt.regs + WDOG_CONTROL_REG_OFFSET); + dw_wdt_keepalive(); } dw_wdt_set_next_heartbeat(); -- 2.1.0