mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 16:07:39 +00:00
5e25db870e
The inline isa_register_driver stub simply allows compilation on systems with CONFIG_ISA disabled; the dummy isa_register_driver does not register an isa_driver at all. The inline isa_register_driver should return -ENODEV to indicate lack of support when attempting to register an isa_driver on such a system with CONFIG_ISA disabled. Cc: Matthew Wilcox <matthew@wil.cx> Reported-by: Sasha Levin <sasha.levin@oracle.com> Tested-by: Ye Xiaolong Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/*
|
|
* ISA bus.
|
|
*/
|
|
|
|
#ifndef __LINUX_ISA_H
|
|
#define __LINUX_ISA_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
|
|
struct isa_driver {
|
|
int (*match)(struct device *, unsigned int);
|
|
int (*probe)(struct device *, unsigned int);
|
|
int (*remove)(struct device *, unsigned int);
|
|
void (*shutdown)(struct device *, unsigned int);
|
|
int (*suspend)(struct device *, unsigned int, pm_message_t);
|
|
int (*resume)(struct device *, unsigned int);
|
|
|
|
struct device_driver driver;
|
|
struct device *devices;
|
|
};
|
|
|
|
#define to_isa_driver(x) container_of((x), struct isa_driver, driver)
|
|
|
|
#ifdef CONFIG_ISA_BUS_API
|
|
int isa_register_driver(struct isa_driver *, unsigned int);
|
|
void isa_unregister_driver(struct isa_driver *);
|
|
#else
|
|
static inline int isa_register_driver(struct isa_driver *d, unsigned int i)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void isa_unregister_driver(struct isa_driver *d)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* module_isa_driver() - Helper macro for registering a ISA driver
|
|
* @__isa_driver: isa_driver struct
|
|
* @__num_isa_dev: number of devices to register
|
|
*
|
|
* Helper macro for ISA drivers which do not do anything special in module
|
|
* init/exit. This eliminates a lot of boilerplate code. Each module may only
|
|
* use this macro once, and calling it replaces module_init and module_exit.
|
|
*/
|
|
#define module_isa_driver(__isa_driver, __num_isa_dev) \
|
|
static int __init __isa_driver##_init(void) \
|
|
{ \
|
|
return isa_register_driver(&(__isa_driver), __num_isa_dev); \
|
|
} \
|
|
module_init(__isa_driver##_init); \
|
|
static void __exit __isa_driver##_exit(void) \
|
|
{ \
|
|
isa_unregister_driver(&(__isa_driver)); \
|
|
} \
|
|
module_exit(__isa_driver##_exit);
|
|
|
|
/**
|
|
* max_num_isa_dev() - Maximum possible number registered of an ISA device
|
|
* @__ida_dev_ext: ISA device address extent
|
|
*
|
|
* The highest base address possible for an ISA device is 0x3FF; this results in
|
|
* 1024 possible base addresses. Dividing the number of possible base addresses
|
|
* by the address extent taken by each device results in the maximum number of
|
|
* devices on a system.
|
|
*/
|
|
#define max_num_isa_dev(__isa_dev_ext) (1024 / __isa_dev_ext)
|
|
|
|
#endif /* __LINUX_ISA_H */
|