mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 01:20:38 +07:00
b2f0c09664
Use the IS_ENABLED() helper macro to ensure that the configfs group is
initialized either when configfs is built-in or when configfs is built as a
module. Otherwise software trigger creation will result in undefined
behaviour when configfs is built as a mdoule since the configfs group for
the trigger is not properly initialized.
Fixes: b662f809d4 ("iio: core: Introduce IIO software triggers")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Daniel Baluta <daniel.baluta@intel.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/*
|
|
* Industrial I/O software trigger interface
|
|
*
|
|
* Copyright (c) 2015 Intel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef __IIO_SW_TRIGGER
|
|
#define __IIO_SW_TRIGGER
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/configfs.h>
|
|
|
|
#define module_iio_sw_trigger_driver(__iio_sw_trigger_type) \
|
|
module_driver(__iio_sw_trigger_type, iio_register_sw_trigger_type, \
|
|
iio_unregister_sw_trigger_type)
|
|
|
|
struct iio_sw_trigger_ops;
|
|
|
|
struct iio_sw_trigger_type {
|
|
const char *name;
|
|
struct module *owner;
|
|
const struct iio_sw_trigger_ops *ops;
|
|
struct list_head list;
|
|
struct config_group *group;
|
|
};
|
|
|
|
struct iio_sw_trigger {
|
|
struct iio_trigger *trigger;
|
|
struct iio_sw_trigger_type *trigger_type;
|
|
struct config_group group;
|
|
};
|
|
|
|
struct iio_sw_trigger_ops {
|
|
struct iio_sw_trigger* (*probe)(const char *);
|
|
int (*remove)(struct iio_sw_trigger *);
|
|
};
|
|
|
|
static inline
|
|
struct iio_sw_trigger *to_iio_sw_trigger(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct iio_sw_trigger,
|
|
group);
|
|
}
|
|
|
|
int iio_register_sw_trigger_type(struct iio_sw_trigger_type *tt);
|
|
void iio_unregister_sw_trigger_type(struct iio_sw_trigger_type *tt);
|
|
|
|
struct iio_sw_trigger *iio_sw_trigger_create(const char *, const char *);
|
|
void iio_sw_trigger_destroy(struct iio_sw_trigger *);
|
|
|
|
int iio_sw_trigger_type_configfs_register(struct iio_sw_trigger_type *tt);
|
|
void iio_sw_trigger_type_configfs_unregister(struct iio_sw_trigger_type *tt);
|
|
|
|
static inline
|
|
void iio_swt_group_init_type_name(struct iio_sw_trigger *t,
|
|
const char *name,
|
|
struct config_item_type *type)
|
|
{
|
|
#if IS_ENABLED(CONFIG_CONFIGFS_FS)
|
|
config_group_init_type_name(&t->group, name, type);
|
|
#endif
|
|
}
|
|
|
|
#endif /* __IIO_SW_TRIGGER */
|