diff options
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/sgbuf.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/core/sgbuf.c b/sound/core/sgbuf.c index 9666a95f5a5c..8352a5cdb19f 100644 --- a/sound/core/sgbuf.c +++ b/sound/core/sgbuf.c @@ -183,10 +183,19 @@ static unsigned int snd_dma_sg_get_chunk_size(struct snd_dma_buffer *dmab, return size; } +static int snd_dma_sg_mmap(struct snd_dma_buffer *dmab, + struct vm_area_struct *area) +{ + if (dmab->dev.type == SNDRV_DMA_TYPE_DEV_WC_SG) + area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); + return -ENOENT; /* continue with the default mmap handler */ +} + const struct snd_malloc_ops snd_dma_sg_ops = { .alloc = snd_dma_sg_alloc, .free = snd_dma_sg_free, .get_addr = snd_dma_sg_get_addr, .get_page = snd_dma_sg_get_page, .get_chunk_size = snd_dma_sg_get_chunk_size, + .mmap = snd_dma_sg_mmap, }; |