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ACPI: bus: Drop two fields from struct acpi_device_pnp

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There are two fields in struct acpi_device_pnp, device_name and
device_class, that were supposed to be populated and used by device
drivers, but they have never been used consistently and now they
are only set for the bus object in acpi_set_pnp_ids() (and never
read afterward).

Drop them along with all of the associated symbols except for
MAX_ACPI_CLASS_NAME_LEN and the acpi_device_class typedef that
are used by the ACPI netlink messaging code.  Move those two
definitions closer to the struct acpi_bus_event that refers to
the acpi_device_class type.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <[email protected]>
Reviewed-by: Hans de Goede <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Link: https://patch.msgid.link/[email protected]
This commit is contained in:
Rafael J. Wysocki committed 2026-09-01 21:45:50 +02:00
1 parent cee9395acd
commit 4a819ee5f2
2 files changed
+3 -12
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drivers/acpi/scan.c
-4
View File
@@ -28,9 +28,7 @@
#include "internal.h"
#include "sleep.h"
#define ACPI_BUS_CLASS "system_bus"
#define ACPI_BUS_HID "LNXSYBUS"
#define ACPI_BUS_DEVICE_NAME "System Bus"
#define INVALID_ACPI_HANDLE ((acpi_handle)ZERO_PAGE(0))
@@ -1450,8 +1448,6 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
acpi_object_is_system_bus(handle)) {
/* \_SB, \_TZ, LNXSYBUS */
acpi_add_id(pnp, ACPI_BUS_HID);
strscpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
strscpy(pnp->device_class, ACPI_BUS_CLASS);
}
break;
include/acpi/acpi_bus.h
+3 -8
View File
@@ -202,12 +202,8 @@ struct acpi_device_dir {
/* Plug and Play */
#define MAX_ACPI_DEVICE_NAME_LEN 40
#define MAX_ACPI_CLASS_NAME_LEN 20
typedef char acpi_bus_id[8];
typedef u64 acpi_bus_address;
typedef char acpi_device_name[MAX_ACPI_DEVICE_NAME_LEN];
typedef char acpi_device_class[MAX_ACPI_CLASS_NAME_LEN];
struct acpi_hardware_id {
struct list_head list;
@@ -229,16 +225,12 @@ struct acpi_device_pnp {
acpi_bus_address bus_address; /* _ADR */
char *unique_id; /* _UID */
struct list_head ids; /* _HID and _CIDs */
acpi_device_name device_name; /* Driver-determined */
acpi_device_class device_class; /* " */
};
#define acpi_device_bid(d) ((d)->pnp.bus_id)
#define acpi_device_adr(d) ((d)->pnp.bus_address)
const char *acpi_device_hid(struct acpi_device *device);
#define acpi_device_uid(d) ((d)->pnp.unique_id)
#define acpi_device_name(d) ((d)->pnp.device_name)
#define acpi_device_class(d) ((d)->pnp.device_class)
/* Power Management */
@@ -578,6 +570,9 @@ int acpi_dev_for_each_child_reverse(struct acpi_device *adev,
* ------
*/
#define MAX_ACPI_CLASS_NAME_LEN 20
typedef char acpi_device_class[MAX_ACPI_CLASS_NAME_LEN];
struct acpi_bus_event {
struct list_head node;
acpi_device_class device_class;