From: Takashi Iwai Date: Tue, 5 Nov 2019 19:10:07 +0000 (+0100) Subject: ALSA: pcm: Create proc files only for non-empty preallocations X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=d39789912f150b66515ccda7ed00bba828a334d4;p=uclinux-h8%2Flinux.git 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 --- diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c index 19407f79b638..17ee361ce791 100644 --- a/sound/core/pcm_memory.c +++ b/sound/core/pcm_memory.c @@ -203,7 +203,8 @@ static void snd_pcm_lib_preallocate_pages1(struct snd_pcm_substream *substream, if (substream->dma_buffer.bytes > 0) substream->buffer_bytes_max = substream->dma_buffer.bytes; substream->dma_max = max; - preallocate_info_init(substream); + if (max > 0) + preallocate_info_init(substream); }