From f25e6f6b4eae7e25e92e91a570cae84bf83e751a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 2 Feb 2018 09:21:07 +0100 Subject: dma-direct: mark as is_phys Various PCI_DMA_BUS_IS_PHYS implementations rely on this flag to make proper decisions for block and networking addressability. Signed-off-by: Christoph Hellwig --- lib/dma-direct.c | 1 + 1 file changed, 1 insertion(+) (limited to 'lib/dma-direct.c') diff --git a/lib/dma-direct.c b/lib/dma-direct.c index 40b1f92f2214..fdc733cf9e30 100644 --- a/lib/dma-direct.c +++ b/lib/dma-direct.c @@ -152,5 +152,6 @@ const struct dma_map_ops dma_direct_ops = { .map_sg = dma_direct_map_sg, .dma_supported = dma_direct_supported, .mapping_error = dma_direct_mapping_error, + .is_phys = 1, }; EXPORT_SYMBOL(dma_direct_ops); -- cgit v1.2.1 From 42ed64524d846b96afaa8b3f9ba045bcaf11ab0f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 2 Feb 2018 09:51:14 +0100 Subject: dma-direct: comment the dma_direct_free calling convention Signed-off-by: Christoph Hellwig --- lib/dma-direct.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'lib/dma-direct.c') diff --git a/lib/dma-direct.c b/lib/dma-direct.c index fdc733cf9e30..c9e8e21cb334 100644 --- a/lib/dma-direct.c +++ b/lib/dma-direct.c @@ -84,6 +84,10 @@ again: return page_address(page); } +/* + * NOTE: this function must never look at the dma_addr argument, because we want + * to be able to use it as a helper for iommu implementations as well. + */ void dma_direct_free(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs) { -- cgit v1.2.1