switch (substream->dma_buffer.dev.type) {
case SNDRV_DMA_TYPE_UNKNOWN:
- return false;
+ /* we can't know the device, so just assume that the driver does
+ * everything right
+ */
+ return true;
case SNDRV_DMA_TYPE_CONTINUOUS:
case SNDRV_DMA_TYPE_VMALLOC:
return true;