ALSA: Add ifdef CONFIG_GENERIC_ALLOCATOR for SNDRV_DMA_TYPE_IRAM code

[firefly-linux-kernel-4.4.55.git] / sound / core / pcm_native.c

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index a68d4c6d702c80cd461def1c84c4a91a254b21a4..b71be579c6ecb3a5775d4a48e93adad8f530d2dc 100644 (file)
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3199,6 +3199,14 @@ int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
                             struct vm_area_struct *area)
 {
        area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
+#ifdef CONFIG_GENERIC_ALLOCATOR
+       if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
+               area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
+               return remap_pfn_range(area, area->vm_start,
+                               substream->dma_buffer.addr >> PAGE_SHIFT,
+                               area->vm_end - area->vm_start, area->vm_page_prot);
+       }
+#endif /* CONFIG_GENERIC_ALLOCATOR */
 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
        if (!substream->ops->page &&
            substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)