dn->phb = NULL; 
pdn->phb = NULL; 
static int dlpar_remove_phb(char *drc_name, struct device_node *dn){	struct slot *slot;	int rc = 0;	if (!rpaphp_find_pci_bus(dn))		return -EINVAL;	slot = find_slot(dn);	if (slot) {		/* Remove hotplug slot */		if (rpaphp_remove_slot(slot)) {			printk(KERN_ERR				"%s: unable to remove hotplug slot %s\n",				__FUNCTION__, drc_name);			return -EIO;		}	}	BUG_ON(!dn->phb);	rc = dlpar_remove_root_bus(dn->phb);	if (rc < 0)		return rc;	dn->phb = NULL;	return 0;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/1635317facea3094ddf34082cd86797efb1d9f7e/rpadlpar_core.c/buggy/drivers/pci/hotplug/rpadlpar_core.c