/**
* usb_alphatrack_delete
*/
static void usb_alphatrack_delete(struct usb_alphatrack *dev)
{
usb_alphatrack_abort_transfers(dev);
usb_free_urb(dev->interrupt_in_urb);
usb_free_urb(dev->interrupt_out_urb);
kfree(dev->ring_buffer);
kfree(dev->interrupt_in_buffer);
kfree(dev->interrupt_out_buffer);
kfree(dev); /* fixme oldi_buffer */
}
/**
* usb_alphatrack_release
*/
static int usb_alphatrack_release(struct inode *inode, struct file *file)
{
struct usb_alphatrack *dev;
int retval = 0;
dev = file->private_data;
if (dev == NULL) {
retval = -ENODEV;
goto exit;
}
if (down_interruptible(&dev->sem)) {
retval = -ERESTARTSYS;
goto exit;
}
if (dev->open_count != 1) {
retval = -ENODEV;
goto unlock_exit;
}
if (dev->intf == NULL) {
/* the device was unplugged before the file was released */
up(&dev->sem);
/* unlock here as usb_alphatrack_delete frees dev */
usb_alphatrack_delete(dev);
retval = -ENODEV;
goto exit;
}
/* wait until write transfer is finished */
if (dev->interrupt_out_busy)
wait_event_interruptible_timeout(dev->write_wait,
!dev->interrupt_out_busy,
2 * HZ);
usb_alphatrack_abort_transfers(dev);
dev->open_count = 0;
unlock_exit:
up(&dev->sem);
exit:
return retval;
}
static int usb_alphatrack_release(struct inode *inode, struct file *file)
{
struct usb_alphatrack *dev;
int retval = 0;
dev = file->private_data;
if (dev == NULL) {
retval = -ENODEV;
goto exit;
}
if (down_interruptible(&dev->sem)) {
retval = -ERESTARTSYS;
goto exit;
}
if (dev->open_count != 1) {
retval = -ENODEV;
goto unlock_exit;
}
if (dev->intf == NULL) {
up(&dev->sem);
usb_alphatrack_delete(dev);
retval = -ENODEV;
goto exit;
}
if (dev->interrupt_out_busy)
wait_event_interruptible_timeout(dev->write_wait,
!dev->interrupt_out_busy,
2 * HZ);
usb_alphatrack_abort_transfers(dev);
dev->open_count = 0;
unlock_exit:
up(&dev->sem);
exit:
return retval;
}
