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ALSA: pcm: Simplify check for dma_mmap_coherent() availability 

We check the availability of dma_mmap_coherent() in hw_support_mmap()
but with an ugly ifdef of lots of arch-checks.  Now we have a nice
CONFIG_ARCH_NO_COHERENT_DMA_MMAP kconfig, and this can be used
together with CONFIG_HAS_DMA check for a cleaner and more
comprehensive check.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2017-07-10 16:05:58 +02:00
parent abe594c2cf
commit 85dc0f8554
1 changed files with 2 additions and 4 deletions
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6
sound/core/pcm_native.c
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@ -238,10 +238,8 @@ static bool hw_support_mmap(struct snd_pcm_substream *substream)
{
if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
return false;
/* check architectures that return -EINVAL from dma_mmap_coherent() */
/* FIXME: this should be some global flag */
#if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
/* architecture supports dma_mmap_coherent()? */
#if defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) || !defined(CONFIG_HAS_DMA)
if (!substream->ops->mmap &&
substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
return false;