sparc64: Fix crash with /proc/iomem

When you compile kernel on Sparc64 with heap memory checking and type
"cat /proc/iomem", you get a crash, because pointers in struct
resource are uninitialized.

Most code fills struct resource with zeros, so I assume that it is
responsibility of the caller of request_resource to initialized it,
not the responsibility of request_resource functuion.

After 2.6.29 is out, there could be a check for uninitialized fields
added to request_resource to avoid crashes like this.

Signed-off-by: Mikulas Patocka <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

arch/sparc/kernel/pci_common.c

···
 	const u32 *vdma = of_get_property(pbm->op->node, "virtual-dma", NULL);
 
 	if (vdma) {
-		struct resource *rp = kmalloc(sizeof(*rp), GFP_KERNEL);
+		struct resource *rp = kzalloc(sizeof(*rp), GFP_KERNEL);
 
 		if (!rp) {
 			prom_printf("Cannot allocate IOMMU resource.\n");