On 8/24/20 1:18 AM, Qiang Zhao wrote: > From: Zhao Qiang <[email protected]> > > Kexec maybe need more time than timeout of wdt(sbsa) > which will reset the system. > So it is necessary to add shutdown hook to disable the > wdt when run kexec. >
Please explain why watchdog_stop_on_reboot() does not work. Thanks, Guenter > Signed-off-by: Zhao Qiang <[email protected]> > --- > drivers/watchdog/sbsa_gwdt.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/drivers/watchdog/sbsa_gwdt.c b/drivers/watchdog/sbsa_gwdt.c > index f0f1e3b..bbcd04d 100644 > --- a/drivers/watchdog/sbsa_gwdt.c > +++ b/drivers/watchdog/sbsa_gwdt.c > @@ -313,6 +313,14 @@ static int sbsa_gwdt_probe(struct platform_device *pdev) > return 0; > } > > +static void sbsa_gwdt_shutdown(struct platform_device *pdev) > +{ > + struct sbsa_gwdt *gwdt; > + > + gwdt = platform_get_drvdata(pdev); > + sbsa_gwdt_stop(&gwdt->wdd); > +} > + > /* Disable watchdog if it is active during suspend */ > static int __maybe_unused sbsa_gwdt_suspend(struct device *dev) > { > @@ -357,6 +365,7 @@ static struct platform_driver sbsa_gwdt_driver = { > .pm = &sbsa_gwdt_pm_ops, > .of_match_table = sbsa_gwdt_of_match, > }, > + .shutdown = sbsa_gwdt_shutdown, > .probe = sbsa_gwdt_probe, > .id_table = sbsa_gwdt_pdev_match, > }; >
