linux-kernel - [PATCH] platform/chrome: cros_ec_lpc: Remove EC panic shutdown timeout

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Date:   Wed,  2 Aug 2023 17:58:48 +0000
From:   Rob Barnes <robbarnes@...gle.com>
To:     bleung@...omium.org, groeck@...omium.org, tzungbi@...nel.org,
        dtor@...omium.org
Cc:     Rob Barnes <robbarnes@...gle.com>, chrome-platform@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [PATCH] platform/chrome: cros_ec_lpc: Remove EC panic shutdown timeout

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>
---

 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