linux-kernel - [PATCH v2 1/3] watchdog: sprd: remove watchdog disable from resume fail path

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Message-Id: <20201029023933.24548-2-zhang.lyra@gmail.com>
Date:   Thu, 29 Oct 2020 10:39:31 +0800
From:   Chunyan Zhang <zhang.lyra@...il.com>
To:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>
Cc:     linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Chunyan Zhang <chunyan.zhang@...soc.com>,
        Lingling Xu <ling_ling.xu@...soc.com>,
        Jingchao Ye <jingchao.ye@...soc.com>,
        Xiaoqing Wu <xiaoqing.wu@...soc.com>
Subject: [PATCH v2 1/3] watchdog: sprd: remove watchdog disable from resume fail path

From: Lingling Xu <ling_ling.xu@...soc.com>

sprd_wdt_start() would return fail if the loading operation is not completed
in a certain time, disabling watchdog for that case would probably cause
the kernel crash when kick watchdog later, that's too bad, so remove the
watchdog disable operation for the fail case to make sure other parts in
the kernel can run normally.

[ chunyan: Massaged changelog ]

Fixes: 477603467009 ("watchdog: Add Spreadtrum watchdog driver")
Signed-off-by: Lingling Xu <ling_ling.xu@...soc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@...soc.com>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/watchdog/sprd_wdt.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/watchdog/sprd_wdt.c b/drivers/watchdog/sprd_wdt.c
index 65cb55f3916f..f3c90b4afead 100644
--- a/drivers/watchdog/sprd_wdt.c
+++ b/drivers/watchdog/sprd_wdt.c
@@ -345,15 +345,10 @@ static int __maybe_unused sprd_wdt_pm_resume(struct device *dev)
 	if (ret)
 		return ret;
 
-	if (watchdog_active(&wdt->wdd)) {
+	if (watchdog_active(&wdt->wdd))
 		ret = sprd_wdt_start(&wdt->wdd);
-		if (ret) {
-			sprd_wdt_disable(wdt);
-			return ret;
-		}
-	}
 
-	return 0;
+	return ret;
 }
 
 static const struct dev_pm_ops sprd_wdt_pm_ops = {
-- 
2.20.1