powerpc/macio: Ensure all dma routines get copied over

Also add a comment to dev_archdata, indicating that changes there need
to be verified against the driver code.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/asm/device.h

@@ -9,6 +9,12 @@
 struct dma_map_ops;
 struct device_node;
 
+/*
+ * Arch extensions to struct device.
+ *
+ * When adding fields, consider macio_add_one_device in
+ * drivers/macintosh/macio_asic.c
+ */
 struct dev_archdata {
 	/* DMA operations on that device */
 	struct dma_map_ops	*dma_ops;

drivers/macintosh/macio_asic.c

@@ -387,11 +387,10 @@ static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
 	/* Set the DMA ops to the ones from the PCI device, this could be
 	 * fishy if we didn't know that on PowerMac it's always direct ops
 	 * or iommu ops that will work fine
+	 *
+	 * To get all the fields, copy all archdata
 	 */
-	dev->ofdev.dev.archdata.dma_ops =
-		chip->lbus.pdev->dev.archdata.dma_ops;
-	dev->ofdev.dev.archdata.dma_data =
-		chip->lbus.pdev->dev.archdata.dma_data;
+	dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
 #endif /* CONFIG_PCI */
 
 #ifdef DEBUG