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authorTakashi Iwai <tiwai@suse.de>2008-06-17 18:39:06 +0400
committerTakashi Iwai <tiwai@suse.de>2009-07-08 16:20:20 +0400
commitcc6a8acdeee932f6911d8b236d2c7d6bcc4616f6 (patch)
treeebaadf1a406cf073fd4ce59d5f1f20d499f9cde1 /sound/core/memalloc.c
parent8e4a718ff38d8539938ec3421935904c27e00c39 (diff)
downloadlinux-cc6a8acdeee932f6911d8b236d2c7d6bcc4616f6.tar.xz
ALSA: Fix SG-buffer DMA with non-coherent architectures
Using SG-buffers with dma_alloc_coherent() is often very inefficient on non-coherent architectures because a tracking record could be allocated in addition for each dma_alloc_coherent() call. Instead, simply disable SG-buffers but just allocate normal continuous buffers on non-supported (currently all but x86) architectures. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/memalloc.c')
-rw-r--r--sound/core/memalloc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c
index 1b3534d67686..9e92441f9b78 100644
--- a/sound/core/memalloc.c
+++ b/sound/core/memalloc.c
@@ -199,6 +199,8 @@ int snd_dma_alloc_pages(int type, struct device *device, size_t size,
case SNDRV_DMA_TYPE_DEV:
dmab->area = snd_malloc_dev_pages(device, size, &dmab->addr);
break;
+#endif
+#ifdef CONFIG_SND_DMA_SGBUF
case SNDRV_DMA_TYPE_DEV_SG:
snd_malloc_sgbuf_pages(device, size, dmab, NULL);
break;
@@ -269,6 +271,8 @@ void snd_dma_free_pages(struct snd_dma_buffer *dmab)
case SNDRV_DMA_TYPE_DEV:
snd_free_dev_pages(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr);
break;
+#endif
+#ifdef CONFIG_SND_DMA_SGBUF
case SNDRV_DMA_TYPE_DEV_SG:
snd_free_sgbuf_pages(dmab);
break;