platforms/pseries/hotplug-cpu.c

158 	int rc = -ENOSPC;
197 		rc = 0;
201 	return rc;
214 	int rc = 0;
240 	rc = find_cpu_id_range(nthreads, node, &cpu_mask);
241 	if (rc && nr_node_ids > 1) {
246 		rc = find_cpu_id_range(nthreads, NUMA_NO_NODE, &cpu_mask);
249 	if (rc) {
285 	return rc;
327 	int rc = 0;
358 				rc = -EBUSY;
363 			rc = device_offline(get_cpu_device(cpu));
364 			if (rc)
378 	return rc;
383 	int rc = 0;
411 			rc = device_online(get_cpu_device(cpu));
412 			if (rc) {
427 	return rc;
436 	int rc;
442 		rc = of_property_read_u32(child, "ibm,my-drc-index",
444 		if (rc)
502 	int rc, index;
515 		rc = of_property_read_u32_index(parent, "ibm,drc-indexes",
518 		if (rc)
552 	int rc, saved_rc;
574 	rc = dlpar_acquire_drc(drc_index);
575 	if (rc) {
576 		pr_warn("Failed to acquire DRC, rc: %d, drc index: %x\n",
577 			rc, drc_index);
591 	rc = pseries_cpuhp_attach_nodes(dn);
596 	if (rc) {
597 		saved_rc = rc;
598 		pr_warn("Failed to attach node %pOFn, rc: %d, drc index: %x\n",
599 			dn, rc, drc_index);
601 		rc = dlpar_release_drc(drc_index);
602 		if (!rc)
610 	rc = dlpar_online_cpu(dn);
611 	if (rc) {
612 		saved_rc = rc;
613 		pr_warn("Failed to online cpu %pOFn, rc: %d, drc index: %x\n",
614 			dn, rc, drc_index);
616 		rc = dlpar_detach_node(dn);
617 		if (!rc)
625 	return rc;
684 	int rc;
689 	rc = dlpar_offline_cpu(dn);
690 	if (rc) {
691 		pr_warn("Failed to offline CPU %pOFn, rc: %d\n", dn, rc);
695 	rc = dlpar_release_drc(drc_index);
696 	if (rc) {
697 		pr_warn("Failed to release drc (%x) for CPU %pOFn, rc: %d\n",
698 			drc_index, dn, rc);
700 		return rc;
703 	rc = pseries_cpuhp_detach_nodes(dn);
704 	if (rc) {
705 		int saved_rc = rc;
707 		pr_warn("Failed to detach CPU %pOFn, rc: %d", dn, rc);
709 		rc = dlpar_acquire_drc(drc_index);
710 		if (!rc)
724 	int rc;
727 		rc = of_property_read_u32(dn, "ibm,my-drc-index", &my_index);
728 		if (rc)
741 	int rc;
750 	rc = dlpar_cpu_remove(dn, drc_index);
752 	return rc;
758 	int rc;
767 			rc = dlpar_cpu_remove_by_index(drc_index);
773 			if (rc)
777 			rc = -EINVAL;
781 			rc = dlpar_cpu_add(drc_index);
783 			rc = -EINVAL;
787 		rc = -EINVAL;
792 	return rc;
800 	int rc;
802 	rc = kstrtou32(buf, 0, &drc_index);
803 	if (rc)
806 	rc = dlpar_cpu_add(drc_index);
808 	return rc ? rc : count;
815 	int rc;
821 	rc = of_property_read_u32(dn, "ibm,my-drc-index", &drc_index);
822 	if (rc) {
827 	rc = dlpar_cpu_remove(dn, drc_index);
830 	return rc ? rc : count;