snd_pcm_lib_malloc_pages (9)

int snd_pcm_lib_malloc_pages(struct snd_pcm_substream * substream, size_t size);

substream

the substream to allocate the DMA buffer to

size

the requested buffer size in bytes

Allocates the DMA buffer on the BUS type given earlier to snd_pcm_lib_preallocate_xxx_pages.

1 if the buffer is changed, 0 if not changed, or a negative code on failure.