powerpc: implement arch_setup_pdev_archdata

We have a long standing issues with platform devices not have a valid
dma_mask pointer.  This hasn't been an issue to date as no platform
device has tried to set its dma_mask value to a non-default value.
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/kernel/setup-common.c

@@ -709,29 +709,9 @@ void ppc_printk_progress(char *s, unsigned short hex)
 	pr_info("%s\n", s);
 }
 
-static int ppc_dflt_bus_notify(struct notifier_block *nb,
-				unsigned long action, void *data)
+void arch_setup_pdev_archdata(struct platform_device *pdev)
 {
-	struct device *dev = data;
-
-	/* We are only intereted in device addition */
-	if (action != BUS_NOTIFY_ADD_DEVICE)
-		return 0;
-
-	set_dma_ops(dev, &dma_direct_ops);
-
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block ppc_dflt_plat_bus_notifier = {
-	.notifier_call = ppc_dflt_bus_notify,
-	.priority = INT_MAX,
-};
-
-static int __init setup_bus_notifier(void)
-{
-	bus_register_notifier(&platform_bus_type, &ppc_dflt_plat_bus_notifier);
-	return 0;
+	pdev->archdata.dma_mask = DMA_BIT_MASK(32);
+	pdev->dev.dma_mask = &pdev->archdata.dma_mask;
+ 	set_dma_ops(&pdev->dev, &dma_direct_ops);
 }
-
-arch_initcall(setup_bus_notifier);

drivers/of/platform.c

@@ -153,7 +153,7 @@ struct platform_device *of_device_alloc(struct device_node *np,
 	}
 
 	dev->dev.of_node = of_node_get(np);
-#if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE)
+#if defined(CONFIG_MICROBLAZE)
 	dev->dev.dma_mask = &dev->archdata.dma_mask;
 #endif
 	dev->dev.parent = parent;
@@ -189,7 +189,7 @@ struct platform_device *of_platform_device_create(struct device_node *np,
 	if (!dev)
 		return NULL;
 
-#if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE)
+#if defined(CONFIG_MICROBLAZE)
 	dev->archdata.dma_mask = 0xffffffffUL;
 #endif
 	dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);