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 */
