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ACPI: store owner from modules with acpi_bus_register_driver()

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Modules registering driver with acpi_bus_register_driver() often forget to
set .owner field.  The field is used by some of other kernel parts for
reference counting (try_module_get()), so it is expected that drivers
will set it.

Solve the problem by moving this task away from the drivers to the core
ACPI bus code, just like we did for platform_driver in
commit 9447057eaf ("platform_device: use a macro instead of
platform_driver_register").

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Krzysztof Kozlowski 2024-03-28 20:49:11 +01:00 committed by Rafael J. Wysocki
parent 403ad17c06
commit 48b9c4862b
2 changed files with 11 additions and 5 deletions
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9
drivers/acpi/bus.c
View file

@ -995,25 +995,26 @@ EXPORT_SYMBOL_GPL(acpi_driver_match_device);
-------------------------------------------------------------------------- */
/**
* acpi_bus_register_driver - register a driver with the ACPI bus
* __acpi_bus_register_driver - register a driver with the ACPI bus
* @driver: driver being registered
* @owner: owning module/driver
*
* Registers a driver with the ACPI bus. Searches the namespace for all
* devices that match the driver's criteria and binds. Returns zero for
* success or a negative error status for failure.
*/
int acpi_bus_register_driver(struct acpi_driver *driver)
int __acpi_bus_register_driver(struct acpi_driver *driver, struct module *owner)
{
if (acpi_disabled)
return -ENODEV;
driver->drv.name = driver->name;
driver->drv.bus = &acpi_bus_type;
driver->drv.owner = driver->owner;
driver->drv.owner = owner;
return driver_register(&driver->drv);
}
EXPORT_SYMBOL(acpi_bus_register_driver);
EXPORT_SYMBOL(__acpi_bus_register_driver);
/**
* acpi_bus_unregister_driver - unregisters a driver with the ACPI bus

7
include/acpi/acpi_bus.h
View file

@ -656,7 +656,12 @@ void acpi_scan_lock_release(void);
void acpi_lock_hp_context(void);
void acpi_unlock_hp_context(void);
int acpi_scan_add_handler(struct acpi_scan_handler *handler);
int acpi_bus_register_driver(struct acpi_driver *driver);
/*
* use a macro to avoid include chaining to get THIS_MODULE
*/
#define acpi_bus_register_driver(drv) \
__acpi_bus_register_driver(drv, THIS_MODULE)
int __acpi_bus_register_driver(struct acpi_driver *driver, struct module *owner);
void acpi_bus_unregister_driver(struct acpi_driver *driver);
int acpi_bus_scan(acpi_handle handle);
void acpi_bus_trim(struct acpi_device *start);