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dc334b9bf9
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_COMPANION() check against NULL to the
platform/x86 acer-wireless driver.
Fixes: f7e648027d ("platform/x86: acer-wireless: 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/4746824.LvFx2qVVIh@rafael.j.wysocki
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Acer Wireless Radio Control Driver
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*
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* Copyright (C) 2017 Endless Mobile, Inc.
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*/
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#include <linux/acpi.h>
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#include <linux/input.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci_ids.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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static const struct acpi_device_id acer_wireless_acpi_ids[] = {
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{"10251229", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, acer_wireless_acpi_ids);
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static void acer_wireless_notify(acpi_handle handle, u32 event, void *data)
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{
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struct device *dev = data;
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struct input_dev *idev = dev_get_drvdata(dev);
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dev_dbg(dev, "event=%#x\n", event);
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if (event != 0x80) {
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dev_notice(dev, "Unknown SMKB event: %#x\n", event);
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return;
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}
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input_report_key(idev, KEY_RFKILL, 1);
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input_sync(idev);
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input_report_key(idev, KEY_RFKILL, 0);
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input_sync(idev);
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}
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static int acer_wireless_probe(struct platform_device *pdev)
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{
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struct acpi_device *adev;
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struct input_dev *idev;
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int ret;
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adev = ACPI_COMPANION(&pdev->dev);
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if (!adev)
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return -ENODEV;
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idev = devm_input_allocate_device(&pdev->dev);
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if (!idev)
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return -ENOMEM;
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platform_set_drvdata(pdev, idev);
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idev->name = "Acer Wireless Radio Control";
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idev->phys = "acer-wireless/input0";
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idev->id.bustype = BUS_HOST;
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idev->id.vendor = PCI_VENDOR_ID_AI;
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idev->id.product = 0x1229;
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set_bit(EV_KEY, idev->evbit);
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set_bit(KEY_RFKILL, idev->keybit);
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ret = input_register_device(idev);
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if (ret)
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return ret;
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return acpi_dev_install_notify_handler(adev, ACPI_DEVICE_NOTIFY,
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acer_wireless_notify,
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&pdev->dev);
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}
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static void acer_wireless_remove(struct platform_device *pdev)
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{
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acpi_dev_remove_notify_handler(ACPI_COMPANION(&pdev->dev),
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ACPI_DEVICE_NOTIFY,
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acer_wireless_notify);
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}
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static struct platform_driver acer_wireless_driver = {
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.probe = acer_wireless_probe,
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.remove = acer_wireless_remove,
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.driver = {
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.name = "Acer Wireless Radio Control Driver",
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.acpi_match_table = acer_wireless_acpi_ids,
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},
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};
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module_platform_driver(acer_wireless_driver);
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MODULE_DESCRIPTION("Acer Wireless Radio Control Driver");
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MODULE_AUTHOR("Chris Chiu <chiu@gmail.com>");
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MODULE_LICENSE("GPL v2");
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