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Message-ID: <CABXOdTd0B2YwXkrr6t7Mx-LwOuV+9O9Q91P7M_=8d3iqGQ+=cg@mail.gmail.com>
Date: Wed, 2 Aug 2023 11:54:41 -0700
From: Guenter Roeck <groeck@...gle.com>
To: Rob Barnes <robbarnes@...gle.com>
Cc: bleung@...omium.org, groeck@...omium.org, tzungbi@...nel.org,
dtor@...omium.org, chrome-platform@...ts.linux.dev,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/chrome: cros_ec_lpc: Remove EC panic shutdown timeout
On Wed, Aug 2, 2023 at 10:59 AM Rob Barnes <robbarnes@...gle.com> wrote:
>
> Remove the 1 second timeout applied to hw_protection_shutdown after an
> EC panic. On some platforms this 1 second timeout is insufficient to
> allow the filesystem to fully sync. Independently the EC will force a
> full system reset after a short period. So this backup timeout is
> unnecessary.
>
> Signed-off-by: Rob Barnes <robbarnes@...gle.com>
Reviewed-by: Guenter Roeck <groeck@...omium.org>
> ---
>
> drivers/platform/chrome/cros_ec_lpc.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
> index 500a61b093e47..356572452898d 100644
> --- a/drivers/platform/chrome/cros_ec_lpc.c
> +++ b/drivers/platform/chrome/cros_ec_lpc.c
> @@ -327,8 +327,8 @@ static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data)
> dev_emerg(ec_dev->dev, "CrOS EC Panic Reported. Shutdown is imminent!");
> blocking_notifier_call_chain(&ec_dev->panic_notifier, 0, ec_dev);
> kobject_uevent_env(&ec_dev->dev->kobj, KOBJ_CHANGE, (char **)env);
> - /* Begin orderly shutdown. Force shutdown after 1 second. */
> - hw_protection_shutdown("CrOS EC Panic", 1000);
> + /* Begin orderly shutdown. EC will force reset after a short period. */
> + hw_protection_shutdown("CrOS EC Panic", -1);
> /* Do not query for other events after a panic is reported */
> return;
> }
> --
> 2.41.0.585.gd2178a4bd4-goog
>
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