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staging: comedi: tidy up the general purpose driver functions 

Group all the general comedi driver register/config/attach
prototypes into one place in comedidev.h.

Reorder the functions in drivers.c a bit so they are in a more
logical usage order (bottom to top).

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-01-30 15:24:38 -07:00 committed by Greg Kroah-Hartman
parent 52c9bf4cf5
commit 1ae6b20b88
2 changed files with 73 additions and 70 deletions
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49
drivers/staging/comedi/comedidev.h
View File

@ -258,26 +258,6 @@ static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1;
struct comedi_device *comedi_dev_from_minor(unsigned minor);
int comedi_alloc_subdevices(struct comedi_device *, int);
void comedi_device_detach(struct comedi_device *dev);
int comedi_device_attach(struct comedi_device *dev,
struct comedi_devconfig *it);
int comedi_driver_register(struct comedi_driver *);
int comedi_driver_unregister(struct comedi_driver *);
/**
* module_comedi_driver() - Helper macro for registering a comedi driver
* @__comedi_driver: comedi_driver struct
*
* Helper macro for comedi drivers which do not do anything special in module
* init/exit. This eliminates a lot of boilerplate. Each module may only use
* this macro once, and calling it replaces module_init() and module_exit().
*/
#define module_comedi_driver(__comedi_driver) \
module_driver(__comedi_driver, comedi_driver_register, \
comedi_driver_unregister)
void init_polling(void);
void cleanup_polling(void);
void start_polling(struct comedi_device *);
@ -384,9 +364,32 @@ void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,
int comedi_alloc_subdevice_minor(struct comedi_device *dev,
struct comedi_subdevice *s);
void comedi_free_subdevice_minor(struct comedi_subdevice *s);
int comedi_auto_config(struct device *hardware_device,
struct comedi_driver *driver, unsigned long context);
void comedi_auto_unconfig(struct device *hardware_device);
/* drivers.c - general comedi driver functions */
int comedi_alloc_subdevices(struct comedi_device *, int);
void comedi_device_detach(struct comedi_device *);
int comedi_device_attach(struct comedi_device *, struct comedi_devconfig *);
int comedi_auto_config(struct device *, struct comedi_driver *,
unsigned long context);
void comedi_auto_unconfig(struct device *);
int comedi_driver_register(struct comedi_driver *);
int comedi_driver_unregister(struct comedi_driver *);
/**
* module_comedi_driver() - Helper macro for registering a comedi driver
* @__comedi_driver: comedi_driver struct
*
* Helper macro for comedi drivers which do not do anything special in module
* init/exit. This eliminates a lot of boilerplate. Each module may only use
* this macro once, and calling it replaces module_init() and module_exit().
*/
#define module_comedi_driver(__comedi_driver) \
module_driver(__comedi_driver, comedi_driver_register, \
comedi_driver_unregister)
#ifdef CONFIG_COMEDI_PCI_DRIVERS

94
drivers/staging/comedi/drivers.c
View File

@ -386,53 +386,6 @@ int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it)
return comedi_device_postconfig(dev);
}
int comedi_driver_register(struct comedi_driver *driver)
{
driver->next = comedi_drivers;
comedi_drivers = driver;
return 0;
}
EXPORT_SYMBOL(comedi_driver_register);
int comedi_driver_unregister(struct comedi_driver *driver)
{
struct comedi_driver *prev;
int i;
/* check for devices using this driver */
for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
struct comedi_device *dev = comedi_dev_from_minor(i);
if (!dev)
continue;
mutex_lock(&dev->mutex);
if (dev->attached && dev->driver == driver) {
if (dev->use_count)
dev_warn(dev->class_dev,
"BUG! detaching device with use_count=%d\n",
dev->use_count);
comedi_device_detach(dev);
}
mutex_unlock(&dev->mutex);
}
if (comedi_drivers == driver) {
comedi_drivers = driver->next;
return 0;
}
for (prev = comedi_drivers; prev->next; prev = prev->next) {
if (prev->next == driver) {
prev->next = driver->next;
return 0;
}
}
return -EINVAL;
}
EXPORT_SYMBOL(comedi_driver_unregister);
int comedi_auto_config(struct device *hardware_device,
struct comedi_driver *driver, unsigned long context)
{
@ -492,3 +445,50 @@ void comedi_auto_unconfig(struct device *hardware_device)
comedi_free_board_minor(minor);
}
EXPORT_SYMBOL_GPL(comedi_auto_unconfig);
int comedi_driver_register(struct comedi_driver *driver)
{
driver->next = comedi_drivers;
comedi_drivers = driver;
return 0;
}
EXPORT_SYMBOL(comedi_driver_register);
int comedi_driver_unregister(struct comedi_driver *driver)
{
struct comedi_driver *prev;
int i;
/* check for devices using this driver */
for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
struct comedi_device *dev = comedi_dev_from_minor(i);
if (!dev)
continue;
mutex_lock(&dev->mutex);
if (dev->attached && dev->driver == driver) {
if (dev->use_count)
dev_warn(dev->class_dev,
"BUG! detaching device with use_count=%d\n",
dev->use_count);
comedi_device_detach(dev);
}
mutex_unlock(&dev->mutex);
}
if (comedi_drivers == driver) {
comedi_drivers = driver->next;
return 0;
}
for (prev = comedi_drivers; prev->next; prev = prev->next) {
if (prev->next == driver) {
prev->next = driver->next;
return 0;
}
}
return -EINVAL;
}
EXPORT_SYMBOL(comedi_driver_unregister);