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| author |   Takashi Iwai <tiwai@suse.de> | 2019-11-05 20:10:07 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-11-06 15:43:34 +0100 |
| commit | d39789912f150b66515ccda7ed00bba828a334d4 (patch) | |
| tree | 2c43485ace2671eb6f7860791286223d4c735ca7 | |
| parent | ALSA: pcm: Warn if doubly preallocated (diff) | |
| download | linux-dev-d39789912f150b66515ccda7ed00bba828a334d4.tar.xz linux-dev-d39789912f150b66515ccda7ed00bba828a334d4.zip | |
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>
| -rw-r--r-- | sound/core/pcm_memory.c | 3 |
1 files changed, 2 insertions, 1 deletions
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); } |