X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=sound%2Fcore%2Fpcm_native.c;h=b71be579c6ecb3a5775d4a48e93adad8f530d2dc;hb=a5606f85611267047206d8ba055bc0e4ba166ad3;hp=a68d4c6d702c80cd461def1c84c4a91a254b21a4;hpb=d4639ebadb758219ccef97d1f37c0ac44c53de5a;p=firefly-linux-kernel-4.4.55.git

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index a68d4c6d702c..b71be579c6ec 100644
--- 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)