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8c33915d77
Some WMI implementations do notifies on WMI objects without a _WED method allow WMI drivers to indicate that _WED should not be called for notifies on the WMI objects the driver is bound to. Instead the driver's notify callback will simply be called with a NULL data argument. Reported-by: Yauhen Kharuzhy <jekhor@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20211128190031.405620-3-hdegoede@redhat.com
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* wmi.h - ACPI WMI interface
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*
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* Copyright (c) 2015 Andrew Lutomirski
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*/
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#ifndef _LINUX_WMI_H
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#define _LINUX_WMI_H
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#include <linux/device.h>
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#include <linux/acpi.h>
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#include <linux/mod_devicetable.h>
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#include <uapi/linux/wmi.h>
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struct wmi_device {
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struct device dev;
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/* True for data blocks implementing the Set Control Method */
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bool setable;
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};
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/* evaluate the ACPI method associated with this device */
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extern acpi_status wmidev_evaluate_method(struct wmi_device *wdev,
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u8 instance, u32 method_id,
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const struct acpi_buffer *in,
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struct acpi_buffer *out);
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/* Caller must kfree the result. */
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extern union acpi_object *wmidev_block_query(struct wmi_device *wdev,
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u8 instance);
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extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
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struct wmi_driver {
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struct device_driver driver;
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const struct wmi_device_id *id_table;
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bool no_notify_data;
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int (*probe)(struct wmi_device *wdev, const void *context);
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void (*remove)(struct wmi_device *wdev);
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void (*notify)(struct wmi_device *device, union acpi_object *data);
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long (*filter_callback)(struct wmi_device *wdev, unsigned int cmd,
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struct wmi_ioctl_buffer *arg);
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};
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extern int __must_check __wmi_driver_register(struct wmi_driver *driver,
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struct module *owner);
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extern void wmi_driver_unregister(struct wmi_driver *driver);
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#define wmi_driver_register(driver) __wmi_driver_register((driver), THIS_MODULE)
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#define module_wmi_driver(__wmi_driver) \
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module_driver(__wmi_driver, wmi_driver_register, \
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wmi_driver_unregister)
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#endif
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