Re: x86/dma conversion for v4.17-rc1 breaks sound / sst-acpi (commit 6e4bf5867783)

[Christoph Hellwig]

Hi Dominik,

can you try current Linus' master with the following hack applied and
see if that works?

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 47aeb04c1997..32aacd0d56a8 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -1087,6 +1087,6 @@ const struct dma_map_ops swiotlb_dma_ops = {
 	.unmap_sg		= swiotlb_unmap_sg_attrs,
 	.map_page		= swiotlb_map_page,
 	.unmap_page		= swiotlb_unmap_page,
-	.dma_supported		= swiotlb_dma_supported,
+	.dma_supported		= dma_direct_supported,
 };
 #endif /* CONFIG_DMA_DIRECT_OPS */