From 95099d4622f8cb224d94e314c7a8e0df60b13f87 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 08:38:01 +0000
Subject: [PATCH] enable docker ppp
---
kernel/drivers/acpi/acpi_platform.c | 50 ++++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 44 insertions(+), 6 deletions(-)
diff --git a/kernel/drivers/acpi/acpi_platform.c b/kernel/drivers/acpi/acpi_platform.c
index 1f32caa..78d6212 100644
--- a/kernel/drivers/acpi/acpi_platform.c
+++ b/kernel/drivers/acpi/acpi_platform.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* ACPI support for platform bus type.
*
@@ -5,10 +6,6 @@
* Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
* Mathias Nyman <mathias.nyman@linux.intel.com>
* Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/acpi.h>
@@ -22,8 +19,6 @@
#include "internal.h"
-ACPI_MODULE_NAME("platform");
-
static const struct acpi_device_id forbidden_id_list[] = {
{"PNP0000", 0}, /* PIC */
{"PNP0100", 0}, /* Timer */
@@ -32,6 +27,44 @@
{"ACPI000A", 0}, /* IOAPIC */
{"SMB0001", 0}, /* ACPI SMBUS virtual device */
{"", 0},
+};
+
+static struct platform_device *acpi_platform_device_find_by_companion(struct acpi_device *adev)
+{
+ struct device *dev;
+
+ dev = bus_find_device_by_acpi_dev(&platform_bus_type, adev);
+ return dev ? to_platform_device(dev) : NULL;
+}
+
+static int acpi_platform_device_remove_notify(struct notifier_block *nb,
+ unsigned long value, void *arg)
+{
+ struct acpi_device *adev = arg;
+ struct platform_device *pdev;
+
+ switch (value) {
+ case ACPI_RECONFIG_DEVICE_ADD:
+ /* Nothing to do here */
+ break;
+ case ACPI_RECONFIG_DEVICE_REMOVE:
+ if (!acpi_device_enumerated(adev))
+ break;
+
+ pdev = acpi_platform_device_find_by_companion(adev);
+ if (!pdev)
+ break;
+
+ platform_device_unregister(pdev);
+ put_device(&pdev->dev);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block acpi_platform_notifier = {
+ .notifier_call = acpi_platform_device_remove_notify,
};
static void acpi_platform_fill_resource(struct acpi_device *adev,
@@ -133,3 +166,8 @@
return pdev;
}
EXPORT_SYMBOL_GPL(acpi_create_platform_device);
+
+void __init acpi_platform_init(void)
+{
+ acpi_reconfig_notifier_register(&acpi_platform_notifier);
+}
--
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