forked from mirrors/linux
30e88d017f
The driver core ignores the return value of the remove callback, so don't give isa drivers the chance to provide a value. Adapt all isa_drivers with a remove callbacks accordingly; they all return 0 unconditionally anyhow. Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for drivers/net/can/sja1000/tscan1.c Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Acked-by: Wolfram Sang <wsa@kernel.org> # for drivers/i2c/ Reviewed-by: Takashi Iway <tiwai@suse.de> # for sound/ Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for drivers/media/ Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Link: https://lore.kernel.org/r/20210122092449.426097-4-uwe@kleine-koenig.org Signed-off-by: Takashi Iwai <tiwai@suse.de>
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* ISA bus.
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*/
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#ifndef __LINUX_ISA_H
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#define __LINUX_ISA_H
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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struct isa_driver {
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int (*match)(struct device *, unsigned int);
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int (*probe)(struct device *, unsigned int);
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void (*remove)(struct device *, unsigned int);
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void (*shutdown)(struct device *, unsigned int);
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int (*suspend)(struct device *, unsigned int, pm_message_t);
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int (*resume)(struct device *, unsigned int);
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struct device_driver driver;
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struct device *devices;
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};
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#define to_isa_driver(x) container_of((x), struct isa_driver, driver)
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#ifdef CONFIG_ISA_BUS_API
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int isa_register_driver(struct isa_driver *, unsigned int);
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void isa_unregister_driver(struct isa_driver *);
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#else
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static inline int isa_register_driver(struct isa_driver *d, unsigned int i)
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{
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return -ENODEV;
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}
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static inline void isa_unregister_driver(struct isa_driver *d)
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{
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}
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#endif
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/**
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* module_isa_driver() - Helper macro for registering a ISA driver
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* @__isa_driver: isa_driver struct
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* @__num_isa_dev: number of devices to register
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*
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* Helper macro for ISA drivers which do not do anything special in module
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* init/exit. This eliminates a lot of boilerplate code. Each module may only
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* use this macro once, and calling it replaces module_init and module_exit.
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*/
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#define module_isa_driver(__isa_driver, __num_isa_dev) \
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static int __init __isa_driver##_init(void) \
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{ \
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return isa_register_driver(&(__isa_driver), __num_isa_dev); \
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} \
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module_init(__isa_driver##_init); \
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static void __exit __isa_driver##_exit(void) \
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{ \
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isa_unregister_driver(&(__isa_driver)); \
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} \
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module_exit(__isa_driver##_exit);
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/**
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* max_num_isa_dev() - Maximum possible number registered of an ISA device
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* @__ida_dev_ext: ISA device address extent
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*
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* The highest base address possible for an ISA device is 0x3FF; this results in
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* 1024 possible base addresses. Dividing the number of possible base addresses
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* by the address extent taken by each device results in the maximum number of
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* devices on a system.
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*/
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#define max_num_isa_dev(__isa_dev_ext) (1024 / __isa_dev_ext)
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#endif /* __LINUX_ISA_H */
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