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fb506e31b3
The normal bin_attrs field can now handle const pointers. This makes the _new variant unnecessary. Switch all users back. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/r/20250530-sysfs-const-bin_attr-final-v3-4-724bfcf05b99@weissschuh.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* WMI embedded Binary MOF driver
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*
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* Copyright (c) 2015 Andrew Lutomirski
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* Copyright (C) 2017 VMware, Inc. All Rights Reserved.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/sysfs.h>
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#include <linux/types.h>
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#include <linux/wmi.h>
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#define WMI_BMOF_GUID "05901221-D566-11D1-B2F0-00A0C9062910"
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static ssize_t bmof_read(struct file *filp, struct kobject *kobj, const struct bin_attribute *attr,
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char *buf, loff_t off, size_t count)
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{
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struct device *dev = kobj_to_dev(kobj);
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union acpi_object *obj = dev_get_drvdata(dev);
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return memory_read_from_buffer(buf, count, &off, obj->buffer.pointer, obj->buffer.length);
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}
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static const BIN_ATTR_ADMIN_RO(bmof, 0);
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static const struct bin_attribute * const bmof_attrs[] = {
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&bin_attr_bmof,
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NULL
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};
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static size_t bmof_bin_size(struct kobject *kobj, const struct bin_attribute *attr, int n)
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{
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struct device *dev = kobj_to_dev(kobj);
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union acpi_object *obj = dev_get_drvdata(dev);
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return obj->buffer.length;
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}
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static const struct attribute_group bmof_group = {
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.bin_size = bmof_bin_size,
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.bin_attrs = bmof_attrs,
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};
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static const struct attribute_group *bmof_groups[] = {
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&bmof_group,
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NULL
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};
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static int wmi_bmof_probe(struct wmi_device *wdev, const void *context)
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{
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union acpi_object *obj;
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obj = wmidev_block_query(wdev, 0);
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if (!obj) {
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dev_err(&wdev->dev, "failed to read Binary MOF\n");
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return -EIO;
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}
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if (obj->type != ACPI_TYPE_BUFFER) {
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dev_err(&wdev->dev, "Binary MOF is not a buffer\n");
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kfree(obj);
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return -EIO;
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}
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dev_set_drvdata(&wdev->dev, obj);
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return 0;
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}
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static void wmi_bmof_remove(struct wmi_device *wdev)
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{
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union acpi_object *obj = dev_get_drvdata(&wdev->dev);
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kfree(obj);
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}
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static const struct wmi_device_id wmi_bmof_id_table[] = {
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{ .guid_string = WMI_BMOF_GUID },
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{ },
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};
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static struct wmi_driver wmi_bmof_driver = {
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.driver = {
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.name = "wmi-bmof",
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.dev_groups = bmof_groups,
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},
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.probe = wmi_bmof_probe,
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.remove = wmi_bmof_remove,
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.id_table = wmi_bmof_id_table,
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.no_singleton = true,
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};
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module_wmi_driver(wmi_bmof_driver);
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MODULE_DEVICE_TABLE(wmi, wmi_bmof_id_table);
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MODULE_AUTHOR("Andrew Lutomirski <luto@kernel.org>");
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MODULE_DESCRIPTION("WMI embedded Binary MOF driver");
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MODULE_LICENSE("GPL");
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