if (pci->iommu_table && 
if (pci && pci->iommu_table && 
static int iommu_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node){	int err = NOTIFY_OK;	struct device_node *np = node;	struct pci_dn *pci = np->data;	switch (action) {	case PSERIES_RECONFIG_REMOVE:		if (pci->iommu_table &&		    get_property(np, "ibm,dma-window", NULL))			iommu_free_table(np);		break;	default:		err = NOTIFY_DONE;		break;	}	return err;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/8902e87f1fc72740a40686a31ca07e6c2cf1f0f2/iommu.c/buggy/arch/powerpc/platforms/pseries/iommu.c