Return DMA_ERROR_CODE to indicate no support.
Signed-off-by: Will Davis <wdavis@xxxxxxxxxx>
---
arch/x86/kernel/pci-calgary_64.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
index 0497f71..ec3d998 100644
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -431,6 +431,19 @@ static void calgary_unmap_page(struct device *dev, dma_addr_t dma_addr,
iommu_free(tbl, dma_addr, npages);
}
+#ifdef CONFIG_HAS_DMA_P2P
+static dma_peer_addr_t calgary_map_peer_resource(struct device *dev,
+ struct device *peer,
+ struct resource *res,
+ unsigned long offset,
+ size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ return DMA_ERROR_CODE;
+}
+#endif
+
static void* calgary_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag, struct dma_attrs *attrs)
{
@@ -485,6 +498,9 @@ static struct dma_map_ops calgary_dma_ops = {
.unmap_sg = calgary_unmap_sg,
.map_page = calgary_map_page,
.unmap_page = calgary_unmap_page,
+#ifdef CONFIG_HAS_DMA_P2P
+ .map_peer_resource = calgary_map_peer_resource,
+#endif
};
static inline void __iomem * busno_to_bbar(unsigned char num)
--
2.5.1
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