mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Greg Kroah-Hartman](/assets/img/avatar_default.png)
The uevent() callback in struct bus_type should not be modifying the device that is passed into it, so mark it as a const * and propagate the function signature changes out into all relevant subsystems that use this callback. Acked-by: Rafael J. Wysocki <rafael@kernel.org> Acked-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20230111113018.459199-16-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* HD-audio bus
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/export.h>
|
|
#include <sound/hdaudio.h>
|
|
|
|
MODULE_DESCRIPTION("HD-audio bus");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/**
|
|
* hdac_get_device_id - gets the hdac device id entry
|
|
* @hdev: HD-audio core device
|
|
* @drv: HD-audio codec driver
|
|
*
|
|
* Compares the hdac device vendor_id and revision_id to the hdac_device
|
|
* driver id_table and returns the matching device id entry.
|
|
*/
|
|
const struct hda_device_id *
|
|
hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv)
|
|
{
|
|
if (drv->id_table) {
|
|
const struct hda_device_id *id = drv->id_table;
|
|
|
|
while (id->vendor_id) {
|
|
if (hdev->vendor_id == id->vendor_id &&
|
|
(!id->rev_id || id->rev_id == hdev->revision_id))
|
|
return id;
|
|
id++;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(hdac_get_device_id);
|
|
|
|
static int hdac_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
|
|
{
|
|
if (hdac_get_device_id(dev, drv))
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static int hda_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
struct hdac_device *hdev = dev_to_hdac_dev(dev);
|
|
struct hdac_driver *hdrv = drv_to_hdac_driver(drv);
|
|
|
|
if (hdev->type != hdrv->type)
|
|
return 0;
|
|
|
|
/*
|
|
* if driver provided a match function use that otherwise we will
|
|
* use hdac_codec_match function
|
|
*/
|
|
if (hdrv->match)
|
|
return hdrv->match(hdev, hdrv);
|
|
else
|
|
return hdac_codec_match(hdev, hdrv);
|
|
return 1;
|
|
}
|
|
|
|
static int hda_uevent(const struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
char modalias[32];
|
|
|
|
snd_hdac_codec_modalias(dev_to_hdac_dev(dev), modalias,
|
|
sizeof(modalias));
|
|
if (add_uevent_var(env, "MODALIAS=%s", modalias))
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
struct bus_type snd_hda_bus_type = {
|
|
.name = "hdaudio",
|
|
.match = hda_bus_match,
|
|
.uevent = hda_uevent,
|
|
};
|
|
EXPORT_SYMBOL_GPL(snd_hda_bus_type);
|
|
|
|
static int __init hda_bus_init(void)
|
|
{
|
|
return bus_register(&snd_hda_bus_type);
|
|
}
|
|
|
|
static void __exit hda_bus_exit(void)
|
|
{
|
|
bus_unregister(&snd_hda_bus_type);
|
|
}
|
|
|
|
subsys_initcall(hda_bus_init);
|
|
module_exit(hda_bus_exit);
|