The patch titled
Subject: platform/chrome: cros_ec_lpc: prepare for hw_protection_shutdown removal
has been added to the -mm mm-nonmm-unstable branch. Its filename is
platform-chrome-cros_ec_lpc-prepare-for-hw_protection_shutdown-removal.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/platform-chrome-cros_ec_lpc-prepare-for-hw_protection_shutdown-removal.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
Subject: platform/chrome: cros_ec_lpc: prepare for hw_protection_shutdown removal
Date: Mon, 17 Feb 2025 21:39:49 +0100
In the general case, a driver doesn't know which of system shutdown or
reboot is the better action to take to protect hardware in an emergency
situation. For this reason, hw_protection_shutdown is going to be removed
in favor of hw_protection_trigger, which defaults to shutdown, but may be
configured at kernel runtime to be a reboot instead.
The ChromeOS EC situation is different as we do know that shutdown is the
correct action as the EC is programmed to force reset after the short
period, thus replace hw_protection_shutdown with __hw_protection_trigger
with HWPROT_ACT_SHUTDOWN as argument to maintain the same behavior.
No functional change.
Link: https://lkml.kernel.org/r/20250217-hw_protection-reboot-v3-9-e1c09b090c0c@xxxxxxxxxxxxxx
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
Acked-by: Tzung-Bi Shih <tzungbi@xxxxxxxxxx>
Cc: Benson Leung <bleung@xxxxxxxxxxxx>
Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Cc: Fabio Estevam <festevam@xxxxxxx>
Cc: Guenter Roeck <groeck@xxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Liam Girdwood <lgirdwood@xxxxxxxxx>
Cc: Lukasz Luba <lukasz.luba@xxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxx>
Cc: Matteo Croce <teknoraver@xxxxxxxx>
Cc: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: Rob Herring (Arm) <robh@xxxxxxxxxx>
Cc: Rui Zhang <rui.zhang@xxxxxxxxx>
Cc: Sascha Hauer <kernel@xxxxxxxxxxxxxx>
Cc: "Serge E. Hallyn" <serge@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/platform/chrome/cros_ec_lpc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/platform/chrome/cros_ec_lpc.c~platform-chrome-cros_ec_lpc-prepare-for-hw_protection_shutdown-removal
+++ a/drivers/platform/chrome/cros_ec_lpc.c
@@ -454,7 +454,7 @@ static void cros_ec_lpc_acpi_notify(acpi
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. EC will force reset after a short period. */
- hw_protection_shutdown("CrOS EC Panic", -1);
+ __hw_protection_trigger("CrOS EC Panic", -1, HWPROT_ACT_SHUTDOWN);
/* Do not query for other events after a panic is reported */
return;
}
_
Patches currently in -mm which might be from a.fatoum@xxxxxxxxxxxxxx are
reboot-replace-__hw_protection_shutdown-bool-action-parameter-with-an-enum.patch
reboot-reboot-not-shutdown-on-hw_protection_reboot-timeout.patch
docs-thermal-sync-hardware-protection-doc-with-code.patch
reboot-describe-do_kernel_restarts-cmd-argument-in-kernel-doc.patch
reboot-rename-now-misleading-__hw_protection_shutdown-symbols.patch
reboot-indicate-whether-it-is-a-hardware-protection-reboot-or-shutdown.patch
reboot-add-support-for-configuring-emergency-hardware-protection-action.patch
regulator-allow-user-configuration-of-hardware-protection-action.patch
platform-chrome-cros_ec_lpc-prepare-for-hw_protection_shutdown-removal.patch
dt-bindings-thermal-give-os-some-leeway-in-absence-of-critical-action.patch
thermal-core-allow-user-configuration-of-hardware-protection-action.patch
reboot-retire-hw_protection_reboot-and-hw_protection_shutdown-helpers.patch
