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Every platform driver can be forced to match a device that doesn't match
its list of device IDs because of device_match_driver_override(), so
platform drivers that rely on the existence of a device's ACPI companion
object need to verify its presence.
Accordingly, add a requisite ACPI_HANDLE() check against NULL to the
platform/x86 intel/smartconnect driver.
Fixes: 8a44bd3ffd ("platform/x86: intel/smartconnect: Convert ACPI driver to a platform one")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/7956676.EvYhyI6sBW@rafael.j.wysocki
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
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*/
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#include <linux/acpi.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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MODULE_DESCRIPTION("Intel Smart Connect disabling driver");
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MODULE_LICENSE("GPL");
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static int smartconnect_acpi_probe(struct platform_device *pdev)
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{
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unsigned long long value;
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acpi_handle handle;
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acpi_status status;
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handle = ACPI_HANDLE(&pdev->dev);
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if (!handle)
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return -ENODEV;
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status = acpi_evaluate_integer(handle, "GAOS", NULL, &value);
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if (ACPI_FAILURE(status))
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return -EINVAL;
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if (value & 0x1) {
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dev_info(&pdev->dev, "Disabling Intel Smart Connect\n");
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status = acpi_execute_simple_method(handle, "SAOS", 0);
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}
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return 0;
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}
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static const struct acpi_device_id smartconnect_ids[] = {
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{"INT33A0", 0},
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{"", 0}
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};
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MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
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static struct platform_driver smartconnect_driver = {
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.probe = smartconnect_acpi_probe,
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.driver = {
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.name = "intel_smart_connect",
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.acpi_match_table = smartconnect_ids,
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},
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};
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module_platform_driver(smartconnect_driver);
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