static int labx_local_audio_release(struct inode *inode, struct file *filp) {
struct labx_local_audio_pdev *local_audio_pdev = (struct labx_local_audio_pdev*)filp->private_data;
/* Invoke the release() operation on the derived driver, if there is one */
if((local_audio_pdev->derivedFops != NULL) &&
(local_audio_pdev->derivedFops->release != NULL)) {
local_audio_pdev->derivedFops->release(inode, filp);
}
/* Also release the DMA instance, if there is one */
if(local_audio_pdev->dma != NULL) labx_dma_release(local_audio_pdev->dma);
return(0);
}
/* This is exported to allow polymorphic drivers to invoke it */
int labx_local_audio_remove(struct labx_local_audio_pdev *local_audio_pdev) {
int deviceIndex;
/* Make sure the DMA unit is no longer running */
labx_dma_release(local_audio_pdev->dma);
misc_deregister(&local_audio_pdev->miscdev);
for (deviceIndex = 0; deviceIndex < MAX_LA_DEVICES; deviceIndex++) {
if (local_audio_pdev == devices[deviceIndex]) {
devices[deviceIndex] = NULL;
break;
}
}
return(0);
}
static int labx_dma_release_cdev(struct inode *inode, struct file *filp) {
struct labx_dma_pdev *dma_pdev = (struct labx_dma_pdev*)filp->private_data;
/* Simply let our DMA know it's closing */
return(labx_dma_release(&dma_pdev->dma));
}