lkml.org 
[lkml]   [2019]   [Nov]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.19 051/220] watchdog: renesas_wdt: stop when unregistering
Date
From: Wolfram Sang <wsa+renesas@sang-engineering.com>

[ Upstream commit 14de99b44b34dbb9d0f64845b1cbb675e047767e ]

We want to go into a sane state when unregistering. Currently, it
happens that the watchdog stops when unbinding because of RuntimePM
stopping the core clock. When rebinding, the core clock gets reactivated
and the watchdog fires even though it hasn't been opened by userspace
yet. Strange scenario, yes, but sane state is much preferred anyhow.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/watchdog/renesas_wdt.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c
index d01efd342dc0c..62d9d3edcdf25 100644
--- a/drivers/watchdog/renesas_wdt.c
+++ b/drivers/watchdog/renesas_wdt.c
@@ -239,6 +239,7 @@ static int rwdt_probe(struct platform_device *pdev)
watchdog_set_drvdata(&priv->wdev, priv);
watchdog_set_nowayout(&priv->wdev, nowayout);
watchdog_set_restart_priority(&priv->wdev, 0);
+ watchdog_stop_on_unregister(&priv->wdev);

/* This overrides the default timeout only if DT configuration was found */
ret = watchdog_init_timeout(&priv->wdev, 0, &pdev->dev);
--
2.20.1


\
 
 \ /
  Last update: 2019-11-22 12:13    [W:1.780 / U:0.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site