[SPARC64]: Handle ISA devices with no 'regs' property.

And this points out that the return value from
isa_dev_get_resource() and the 'pregs' arg to
isa_dev_get_irq() are totally unused.

Based upon a patch from Richard Mortimer <richm@oldelvet.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc64/kernel/isa.c

@@ -22,14 +22,15 @@ static void __init report_dev(struct sparc_isa_device *isa_dev, int child)
 		printk(" [%s", isa_dev->prom_node->name);
 }
 
-static struct linux_prom_registers * __init
-isa_dev_get_resource(struct sparc_isa_device *isa_dev)
+static void __init isa_dev_get_resource(struct sparc_isa_device *isa_dev)
 {
 	struct linux_prom_registers *pregs;
 	unsigned long base, len;
 	int prop_len;
 
 	pregs = of_get_property(isa_dev->prom_node, "reg", &prop_len);
+	if (!pregs)
+		return;
 
 	/* Only the first one is interesting. */
 	len = pregs[0].reg_size;
@@ -44,12 +45,9 @@ isa_dev_get_resource(struct sparc_isa_device *isa_dev)
 
 	request_resource(&isa_dev->bus->parent->io_space,
 			 &isa_dev->resource);
-
-	return pregs;
 }
 
-static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev,
-				   struct linux_prom_registers *pregs)
+static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev)
 {
 	struct of_device *op = of_find_device_by_node(isa_dev->prom_node);
 
@@ -69,7 +67,6 @@ static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
 
 	printk(" ->");
 	while (dp) {
-		struct linux_prom_registers *regs;
 		struct sparc_isa_device *isa_dev;
 
 		isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
@@ -85,8 +82,8 @@ static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
 		isa_dev->bus = parent_isa_dev->bus;
 		isa_dev->prom_node = dp;
 
-		regs = isa_dev_get_resource(isa_dev);
-		isa_dev_get_irq(isa_dev, regs);
+		isa_dev_get_resource(isa_dev);
+		isa_dev_get_irq(isa_dev);
 
 		report_dev(isa_dev, 1);
 
@@ -99,7 +96,6 @@ static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
 	struct device_node *dp = isa_br->prom_node->child;
 
 	while (dp) {
-		struct linux_prom_registers *regs;
 		struct sparc_isa_device *isa_dev;
 
 		isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
@@ -137,8 +133,8 @@ static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
 		isa_dev->bus = isa_br;
 		isa_dev->prom_node = dp;
 
-		regs = isa_dev_get_resource(isa_dev);
-		isa_dev_get_irq(isa_dev, regs);
+		isa_dev_get_resource(isa_dev);
+		isa_dev_get_irq(isa_dev);
 
 		report_dev(isa_dev, 0);