[ARM] Fix IOP13xx build warnings

http://armlinux.simtec.co.uk/kautobuild/2.6.27-rc5/iop13xx_defconfig/zimage.log

Occurrences  Warning text
339  arch/arm/include/asm/dma-mapping.h:40: warning: return makes pointer from integer without a cast
203  arch/arm/include/asm/dma-mapping.h:45: warning: return makes integer from pointer without a cast

Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 39 insertions, 19 deletions

diff --git a/arch/arm/mach-iop13xx/include/mach/memory.h b/arch/arm/mach-iop13xx/include/mach/memory.h
index a74b027432d2..b82602d529bf 100644
--- a/arch/arm/mach-iop13xx/include/mach/memory.h
+++ b/arch/arm/mach-iop13xx/include/mach/memory.h
@@ -26,32 +26,52 @@
 
 /* RAM has 1:1 mapping on the PCIe/x Busses */
 #define __virt_to_bus(x)        (__virt_to_phys(x))
-#define __bus_to_virt(x)    (__phys_to_virt(x))
+#define __bus_to_virt(x)        (__phys_to_virt(x))
 
-#define virt_to_lbus(x)                                            \
-(( ((void*)(x) >= (void*)IOP13XX_PMMR_V_START) &&                  \
-((void*)(x) < (void*)IOP13XX_PMMR_V_END) ) ?                       \
-((x) - IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_PHYS_MEM_BASE) : \
-((x) - PAGE_OFFSET + PHYS_OFFSET))
+static inline dma_addr_t __virt_to_lbus(unsigned long x)
+{
+        return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE;
+}
 
-#define lbus_to_virt(x)                                            \
-(( ((x) >= IOP13XX_PMMR_P_START) && ((x) < IOP13XX_PMMR_P_END) ) ? \
-((x) - IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_VIRT_MEM_BASE ) : \
-((x) - PHYS_OFFSET + PAGE_OFFSET))
+static inline unsigned long __lbus_to_virt(dma_addr_t x)
+{
+        return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE;
+}
+
+#define __is_lbus_dma(a)                                \
+        ((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END)
+
+#define __is_lbus_virt(a)                               \
+        ((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END)
 
 /* Device is an lbus device if it is on the platform bus of the IOP13XX */
-#define is_lbus_device(dev) (dev &&\
-                             (strncmp(dev->bus->name, "platform", 8) == 0))
+#define is_lbus_device(dev)                             \
+        (dev && strncmp(dev->bus->name, "platform", 8) == 0)
 
-#define __arch_page_to_dma(dev, page)                                   \
-({is_lbus_device(dev) ? (dma_addr_t)virt_to_lbus(page_address(page)) : \
-(dma_addr_t)__virt_to_bus(page_address(page));})
+#define __arch_dma_to_virt(dev, addr)                                   \
+        ({                                                              \
+                unsigned long __virt;                                   \
+                dma_addr_t __dma = addr;                                \
+                if (is_lbus_device(dev) && __is_lbus_dma(__dma))        \
+                        __virt = __lbus_to_virt(__dma);                 \
+                else                                                    \
+                        __virt = __bus_to_virt(__dma);                  \
+                (void *)__virt;                                         \
+        })
 
-#define __arch_dma_to_virt(dev, addr) \
-({is_lbus_device(dev) ? lbus_to_virt(addr) : __bus_to_virt(addr);})
+#define __arch_virt_to_dma(dev, addr)                                   \
+        ({                                                              \
+                unsigned long __virt = (unsigned long)addr;             \
+                dma_addr_t __dma;                                       \
+                if (is_lbus_device(dev) && __is_lbus_virt(__virt))      \
+                        __dma = __virt_to_lbus(__virt);                 \
+                else                                                    \
+                        __dma = __virt_to_bus(__virt);                  \
+                __dma;                                                  \
+        })
 
-#define __arch_virt_to_dma(dev, addr) \
-({is_lbus_device(dev) ? virt_to_lbus(addr) : __virt_to_bus(addr);})
+#define __arch_page_to_dma(dev, page)                                   \
+        __arch_virt_to_dma(dev, page_address(page))
 
 #endif /* CONFIG_ARCH_IOP13XX */
 #endif /* !ASSEMBLY */