[ALPHA] Add pci_dma_mapping_error.

include/asm-alpha/pci.h

@@ -85,10 +85,10 @@ extern void *pci_alloc_consistent(struct pci_dev *, size_t, dma_addr_t *);
 
 extern void pci_free_consistent(struct pci_dev *, size_t, void *, dma_addr_t);
 
-/* Map a single buffer of the indicate size for PCI DMA in streaming
-   mode.  The 32-bit PCI bus mastering address to use is returned.
-   Once the device is given the dma address, the device owns this memory
-   until either pci_unmap_single or pci_dma_sync_single_for_cpu is performed.  */
+/* Map a single buffer of the indicate size for PCI DMA in streaming mode.
+   The 32-bit PCI bus mastering address to use is returned.  Once the device
+   is given the dma address, the device owns this memory until either
+   pci_unmap_single or pci_dma_sync_single_for_cpu is performed.  */
 
 extern dma_addr_t pci_map_single(struct pci_dev *, void *, size_t, int);
 
@@ -96,6 +96,14 @@ extern dma_addr_t pci_map_single(struct pci_dev *, void *, size_t, int);
 extern dma_addr_t pci_map_page(struct pci_dev *, struct page *,
 			       unsigned long, size_t, int);
 
+/* Test for pci_map_single or pci_map_page having generated an error.  */
+
+static inline int
+pci_dma_mapping_error(dma_addr_t dma_addr)
+{
+	return dma_addr == 0;
+}
+
 /* Unmap a single streaming mode DMA translation.  The DMA_ADDR and
    SIZE must match what was provided for in a previous pci_map_single
    call.  All other usages are undefined.  After this call, reads by
@@ -153,15 +161,15 @@ extern void pci_unmap_sg(struct pci_dev *, struct scatterlist *, int, int);
    the buffer.  */
 
 static inline void
-pci_dma_sync_single_for_cpu(struct pci_dev *dev, dma_addr_t dma_addr, long size,
-			    int direction)
+pci_dma_sync_single_for_cpu(struct pci_dev *dev, dma_addr_t dma_addr,
+			    long size, int direction)
 {
 	/* Nothing to do.  */
 }
 
 static inline void
-pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr, long size,
-			       int direction)
+pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr,
+			       long size, int direction)
 {
 	/* Nothing to do.  */
 }
@@ -171,15 +179,15 @@ pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr, long si
    but for a scatter-gather list, same rules and usage.  */
 
 static inline void
-pci_dma_sync_sg_for_cpu(struct pci_dev *dev, struct scatterlist *sg, int nents,
-			int direction)
+pci_dma_sync_sg_for_cpu(struct pci_dev *dev, struct scatterlist *sg,
+			int nents, int direction)
 {
 	/* Nothing to do.  */
 }
 
 static inline void
-pci_dma_sync_sg_for_device(struct pci_dev *dev, struct scatterlist *sg, int nents,
-			int direction)
+pci_dma_sync_sg_for_device(struct pci_dev *dev, struct scatterlist *sg,
+			   int nents, int direction)
 {
 	/* Nothing to do.  */
 }
@@ -196,29 +204,32 @@ extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);
 extern int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask);
 
 /* Convert to/from DAC dma address and struct page.  */
-extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *, struct page *, unsigned long, int);
+extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *, struct page *,
+					unsigned long, int);
 extern struct page *pci_dac_dma_to_page(struct pci_dev *, dma64_addr_t);
 extern unsigned long pci_dac_dma_to_offset(struct pci_dev *, dma64_addr_t);
 
 static inline void
-pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
+pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr,
+				size_t len, int direction)
 {
 	/* Nothing to do. */
 }
 
 static inline void
-pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
+pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr,
+				   size_t len, int direction)
 {
 	/* Nothing to do. */
 }
 
-extern void
-pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
-			 struct resource *res);
+extern void pcibios_resource_to_bus(struct pci_dev *, struct pci_bus_region *,
+				    struct resource *);
 
 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
 
-static inline int pci_name_bus(char *name, struct pci_bus *bus)
+static inline int
+pci_name_bus(char *name, struct pci_bus *bus)
 {
 	struct pci_controller *hose = bus->sysdata;
 
@@ -230,7 +241,8 @@ static inline int pci_name_bus(char *name, struct pci_bus *bus)
 	return 0;
 }
 
-static inline void pcibios_add_platform_entries(struct pci_dev *dev)
+static inline void
+pcibios_add_platform_entries(struct pci_dev *dev)
 {
 }