Allocate the buffer area according to the given type
int snd_dma_alloc_pages(int type, struct device * device, size_t size, struct snd_dma_buffer * dmab);
type
the DMA buffer type
device
the device pointer
size
the buffer size to allocate
dmab
buffer allocation record to store the allocated data
Calls the memory-allocator function for the corresponding buffer type.
Zero if the buffer with the given size is allocated successfully, otherwise a negative value on error.