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ALSA: pcm: Create proc files only for non-empty preallocations
It makes little sense to create prealloc proc files for streams that have the zero max size, which is a typical case for vmalloc buffers. Skip the proc file creations to save resources in such a case. Link: https://lore.kernel.org/r/20191105191007.18150-3-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -203,7 +203,8 @@ static void snd_pcm_lib_preallocate_pages1(struct snd_pcm_substream *substream,
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if (substream->dma_buffer.bytes > 0)
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substream->buffer_bytes_max = substream->dma_buffer.bytes;
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substream->dma_max = max;
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preallocate_info_init(substream);
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if (max > 0)
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preallocate_info_init(substream);
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}
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