On 8/24/20 1:18 AM, Qiang Zhao wrote:
> From: Zhao Qiang <qiang.zhao@xxxxxxx>
>
> 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 <qiang.zhao@xxxxxxx>
> ---
> 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,
> };
>
