pages of the given size and map them onto the virtually contiguous
memory. The virtual pointer is addressed in runtime->dma_area.
The physical address (runtime->dma_addr) is set to zero,
- because the buffer is physically non-contigous.
+ because the buffer is physically non-contiguous.
The physical address table is set up in sgbuf->table.
You can get the physical address at a certain offset via
<function>snd_pcm_sgbuf_get_addr()</function>.