extern struct device_type iio_device_type;
+struct iio_dev_buffer_pair {
+ struct iio_dev *indio_dev;
+ struct iio_buffer *buffer;
+};
+
#define IIO_IOCTL_UNHANDLED 1
struct iio_ioctl_handler {
struct list_head entry;
ssize_t iio_buffer_read_outer(struct file *filp, char __user *buf,
size_t n, loff_t *f_ps)
{
- struct iio_dev *indio_dev = filp->private_data;
- struct iio_buffer *rb = indio_dev->buffer;
+ struct iio_dev_buffer_pair *ib = filp->private_data;
+ struct iio_buffer *rb = ib->buffer;
+ struct iio_dev *indio_dev = ib->indio_dev;
DEFINE_WAIT_FUNC(wait, woken_wake_function);
size_t datum_size;
size_t to_wait;
__poll_t iio_buffer_poll(struct file *filp,
struct poll_table_struct *wait)
{
- struct iio_dev *indio_dev = filp->private_data;
- struct iio_buffer *rb = indio_dev->buffer;
+ struct iio_dev_buffer_pair *ib = filp->private_data;
+ struct iio_buffer *rb = ib->buffer;
+ struct iio_dev *indio_dev = ib->indio_dev;
if (!indio_dev->info || rb == NULL)
return 0;
{
struct iio_dev *indio_dev = container_of(inode->i_cdev,
struct iio_dev, chrdev);
+ struct iio_dev_buffer_pair *ib;
if (test_and_set_bit(IIO_BUSY_BIT_POS, &indio_dev->flags))
return -EBUSY;
iio_device_get(indio_dev);
- filp->private_data = indio_dev;
+ ib = kmalloc(sizeof(*ib), GFP_KERNEL);
+ if (!ib) {
+ iio_device_put(indio_dev);
+ clear_bit(IIO_BUSY_BIT_POS, &indio_dev->flags);
+ return -ENOMEM;
+ }
+
+ ib->indio_dev = indio_dev;
+ ib->buffer = indio_dev->buffer;
+
+ filp->private_data = ib;
return 0;
}
*/
static int iio_chrdev_release(struct inode *inode, struct file *filp)
{
+ struct iio_dev_buffer_pair *ib = filp->private_data;
struct iio_dev *indio_dev = container_of(inode->i_cdev,
struct iio_dev, chrdev);
+ kfree(ib);
clear_bit(IIO_BUSY_BIT_POS, &indio_dev->flags);
iio_device_put(indio_dev);
static long iio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
- struct iio_dev *indio_dev = filp->private_data;
+ struct iio_dev_buffer_pair *ib = filp->private_data;
+ struct iio_dev *indio_dev = ib->indio_dev;
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
struct iio_ioctl_handler *h;
int ret = -ENODEV;