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staging: iio: convert idr to ida as pointer never provided 

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Jonathan Cameron 2010-09-04 17:54:43 +01:00 committed by Greg Kroah-Hartman
parent 30295c8936
commit b156cf70e1
2 changed files with 35 additions and 36 deletions
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8
drivers/staging/iio/iio.h
View File

@ -135,7 +135,7 @@ void iio_device_unregister(struct iio_dev *dev_info);
* physical interrupt lines
* @dev_info: the iio device for which the is an interrupt line
* @line_number: associated line number
* @id: idr allocated unique id number
* @id: ida allocated unique id number
* @irq: associate interrupt number
* @ev_list: event handler list for associated events
* @ev_list_lock: ensure only one access to list at a time
@ -302,8 +302,8 @@ static inline bool iio_ring_enabled(struct iio_dev *dev_info)
| INDIO_RING_HARDWARE_BUFFER);
};
struct idr;
struct ida;
int iio_get_new_idr_val(struct idr *this_idr);
void iio_free_idr_val(struct idr *this_idr, int id);
int iio_get_new_ida_val(struct ida *this_ida);
void iio_free_ida_val(struct ida *this_ida, int id);
#endif /* _INDUSTRIAL_IO_H_ */

63
drivers/staging/iio/industrialio-core.c
View File

@ -29,11 +29,11 @@
#define IIO_ID_FORMAT IIO_ID_PREFIX "%d"
/* IDR to assign each registered device a unique id*/
static DEFINE_IDR(iio_idr);
static DEFINE_IDA(iio_ida);
/* IDR to allocate character device minor numbers */
static DEFINE_IDR(iio_chrdev_idr);
static DEFINE_IDA(iio_chrdev_ida);
/* Lock used to protect both of the above */
static DEFINE_SPINLOCK(iio_idr_lock);
static DEFINE_SPINLOCK(iio_ida_lock);
dev_t iio_devt;
EXPORT_SYMBOL(iio_devt);
@ -367,14 +367,14 @@ int iio_device_get_chrdev_minor(void)
{
int ret, val;
idr_again:
if (unlikely(idr_pre_get(&iio_chrdev_idr, GFP_KERNEL) == 0))
ida_again:
if (unlikely(ida_pre_get(&iio_chrdev_ida, GFP_KERNEL) == 0))
return -ENOMEM;
spin_lock(&iio_idr_lock);
ret = idr_get_new(&iio_chrdev_idr, NULL, &val);
spin_unlock(&iio_idr_lock);
spin_lock(&iio_ida_lock);
ret = ida_get_new(&iio_chrdev_ida, &val);
spin_unlock(&iio_ida_lock);
if (unlikely(ret == -EAGAIN))
goto idr_again;
goto ida_again;
else if (unlikely(ret))
return ret;
if (val > IIO_DEV_MAX)
@ -384,9 +384,9 @@ idr_again:
void iio_device_free_chrdev_minor(int val)
{
spin_lock(&iio_idr_lock);
idr_remove(&iio_chrdev_idr, val);
spin_unlock(&iio_idr_lock);
spin_lock(&iio_ida_lock);
ida_remove(&iio_chrdev_ida, val);
spin_unlock(&iio_ida_lock);
}
int iio_setup_ev_int(struct iio_event_interface *ev_int,
@ -517,40 +517,39 @@ static void iio_device_unregister_sysfs(struct iio_dev *dev_info)
}
/* Return a negative errno on failure */
int iio_get_new_idr_val(struct idr *this_idr)
int iio_get_new_ida_val(struct ida *this_ida)
{
int ret;
int val;
idr_again:
if (unlikely(idr_pre_get(this_idr, GFP_KERNEL) == 0))
ida_again:
if (unlikely(ida_pre_get(this_ida, GFP_KERNEL) == 0))
return -ENOMEM;
spin_lock(&iio_idr_lock);
ret = idr_get_new(this_idr, NULL, &val);
spin_unlock(&iio_idr_lock);
spin_lock(&iio_ida_lock);
ret = ida_get_new(this_ida, &val);
spin_unlock(&iio_ida_lock);
if (unlikely(ret == -EAGAIN))
goto idr_again;
goto ida_again;
else if (unlikely(ret))
return ret;
return val;
}
EXPORT_SYMBOL(iio_get_new_idr_val);
EXPORT_SYMBOL(iio_get_new_ida_val);
void iio_free_idr_val(struct idr *this_idr, int id)
void iio_free_ida_val(struct ida *this_ida, int id)
{
spin_lock(&iio_idr_lock);
idr_remove(this_idr, id);
spin_unlock(&iio_idr_lock);
spin_lock(&iio_ida_lock);
ida_remove(this_ida, id);
spin_unlock(&iio_ida_lock);
}
EXPORT_SYMBOL(iio_free_idr_val);
EXPORT_SYMBOL(iio_free_ida_val);
static int iio_device_register_id(struct iio_dev *dev_info,
struct idr *this_idr)
struct ida *this_ida)
{
dev_info->id = iio_get_new_idr_val(&iio_idr);
dev_info->id = iio_get_new_ida_val(&iio_ida);
if (dev_info->id < 0)
return dev_info->id;
return 0;
@ -558,7 +557,7 @@ static int iio_device_register_id(struct iio_dev *dev_info,
static void iio_device_unregister_id(struct iio_dev *dev_info)
{
iio_free_idr_val(&iio_idr, dev_info->id);
iio_free_ida_val(&iio_ida, dev_info->id);
}
static inline int __iio_add_event_config_attrs(struct iio_dev *dev_info, int i)
@ -757,7 +756,7 @@ int iio_device_register(struct iio_dev *dev_info)
{
int ret;
ret = iio_device_register_id(dev_info, &iio_idr);
ret = iio_device_register_id(dev_info, &iio_ida);
if (ret) {
dev_err(&dev_info->dev, "Failed to get id\n");
goto error_ret;
@ -766,7 +765,7 @@ int iio_device_register(struct iio_dev *dev_info)
ret = device_add(&dev_info->dev);
if (ret)
goto error_free_idr;
goto error_free_ida;
ret = iio_device_register_sysfs(dev_info);
if (ret) {
dev_err(dev_info->dev.parent,
@ -788,7 +787,7 @@ error_free_sysfs:
iio_device_unregister_sysfs(dev_info);
error_del_device:
device_del(&dev_info->dev);
error_free_idr:
error_free_ida:
iio_device_unregister_id(dev_info);
error_ret:
return ret;