mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-03 17:40:04 +00:00
![Lars-Peter Clausen](/assets/img/avatar_default.png)
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 device creation will result in undefined behaviour when configfs is built as a module since the configfs group for the device not properly initialized. Similar to commitb2f0c09664
("iio: sw-trigger: Fix config group initialization"). Fixes:0f3a8c3f34
("iio: Add support for creating IIO devices via configfs") Reported-by: Miguel Robles <miguel.robles@farole.net> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Daniel Baluta <daniel.baluta@gmail.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
|
|
* Industrial I/O software device interface
|
|
*
|
|
* Copyright (c) 2016 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_DEVICE
|
|
#define __IIO_SW_DEVICE
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/configfs.h>
|
|
|
|
#define module_iio_sw_device_driver(__iio_sw_device_type) \
|
|
module_driver(__iio_sw_device_type, iio_register_sw_device_type, \
|
|
iio_unregister_sw_device_type)
|
|
|
|
struct iio_sw_device_ops;
|
|
|
|
struct iio_sw_device_type {
|
|
const char *name;
|
|
struct module *owner;
|
|
const struct iio_sw_device_ops *ops;
|
|
struct list_head list;
|
|
struct config_group *group;
|
|
};
|
|
|
|
struct iio_sw_device {
|
|
struct iio_dev *device;
|
|
struct iio_sw_device_type *device_type;
|
|
struct config_group group;
|
|
};
|
|
|
|
struct iio_sw_device_ops {
|
|
struct iio_sw_device* (*probe)(const char *);
|
|
int (*remove)(struct iio_sw_device *);
|
|
};
|
|
|
|
static inline
|
|
struct iio_sw_device *to_iio_sw_device(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct iio_sw_device,
|
|
group);
|
|
}
|
|
|
|
int iio_register_sw_device_type(struct iio_sw_device_type *dt);
|
|
void iio_unregister_sw_device_type(struct iio_sw_device_type *dt);
|
|
|
|
struct iio_sw_device *iio_sw_device_create(const char *, const char *);
|
|
void iio_sw_device_destroy(struct iio_sw_device *);
|
|
|
|
int iio_sw_device_type_configfs_register(struct iio_sw_device_type *dt);
|
|
void iio_sw_device_type_configfs_unregister(struct iio_sw_device_type *dt);
|
|
|
|
static inline
|
|
void iio_swd_group_init_type_name(struct iio_sw_device *d,
|
|
const char *name,
|
|
struct config_item_type *type)
|
|
{
|
|
#if IS_ENABLED(CONFIG_CONFIGFS_FS)
|
|
config_group_init_type_name(&d->group, name, type);
|
|
#endif
|
|
}
|
|
|
|
#endif /* __IIO_SW_DEVICE */
|