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ALSA: pcm: use dma_can_mmap() to check if a device supports dma_mmap_*

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Replace the local hack with the dma_can_mmap helper to check if
a given device supports mapping DMA allocations to userspace.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Christoph Hellwig 2019-08-03 13:31:59 +03:00
parent e29ccc188f
commit 425da15970
1 changed files with 6 additions and 7 deletions
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13
sound/core/pcm_native.c
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@ -220,13 +220,12 @@ static bool hw_support_mmap(struct snd_pcm_substream *substream)
{
if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
return false;
/* 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;
#endif
return true;
if (substream->ops->mmap ||
substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV)
return true;
return dma_can_mmap(substream->dma_buffer.dev.dev);
}
static int constrain_mask_params(struct snd_pcm_substream *substream,