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authorChristoph Hellwig <hch@lst.de>2019-08-03 13:31:59 +0300
committerChristoph Hellwig <hch@lst.de>2019-09-04 11:13:18 +0200
commit425da159707b271dc865d7e167ac104a0e60e4af (patch)
treeb4876e8475f887c32880588e20d56296923efee1 /sound
parente29ccc188f3dae1cb66f59e10e01e0f150642a54 (diff)
downloadlinux-425da159707b271dc865d7e167ac104a0e60e4af.tar.bz2
ALSA: pcm: use dma_can_mmap() to check if a device supports dma_mmap_*
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/core/pcm_native.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 703857aab00f..9763c18e176a 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -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,