ARM: dmabounce: simplify dma_set_mask()

Simplify the dmabounce specific code in dma_set_mask().  We can just
omit setting the dma mask if dmabounce is enabled (we will have already
set dma mask via callbacks when the device is created in that case.)

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 4ad2533..94662f4 100644 (file)
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -133,18 +133,12 @@ static inline int dma_supported(struct device *dev, u64 mask)
 
 static inline int dma_set_mask(struct device *dev, u64 dma_mask)
 {
-#ifdef CONFIG_DMABOUNCE
-       if (dev->archdata.dmabounce) {
-               if (dma_mask >= ISA_DMA_THRESHOLD)
-                       return 0;
-               else
-                       return -EIO;
-       }
-#endif
        if (!dev->dma_mask || !dma_supported(dev, dma_mask))
                return -EIO;
 
+#ifndef CONFIG_DMABOUNCE
        *dev->dma_mask = dma_mask;
+#endif
 
        return 0;
 }