snd_pcm_lib_free_pages(9)

1SND_PCM_LIB_FREE_PAG(9)             PCM API            SND_PCM_LIB_FREE_PAG(9)
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NAME

6       snd_pcm_lib_free_pages - release the allocated DMA buffer.
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9       int snd_pcm_lib_free_pages(struct snd_pcm_substream * substream);
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12       substream
13           the substream to release the DMA buffer
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16       Releases the DMA buffer allocated via snd_pcm_lib_malloc_pages.
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19       Zero if successful, or a negative error code on failure.
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22Kernel Hackers Manual 3.10         June 2019           SND_PCM_LIB_FREE_PAG(9)