/* called with RTNL */
static int br_switchdev_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
struct net_bridge_port *p;
struct net_bridge *br;
struct switchdev_notifier_fdb_info *fdb_info;
int err = NOTIFY_DONE;
p = br_port_get_rtnl(dev);
if (!p)
goto out;
br = p->br;
switch (event) {
case SWITCHDEV_FDB_ADD:
fdb_info = ptr;
err = br_fdb_external_learn_add(br, p, fdb_info->addr,
fdb_info->vid);
if (err)
err = notifier_from_errno(err);
break;
case SWITCHDEV_FDB_DEL:
fdb_info = ptr;
err = br_fdb_external_learn_del(br, p, fdb_info->addr,
fdb_info->vid);
if (err)
err = notifier_from_errno(err);
break;
}
out:
return err;
}
static int profile_cpu_callback(struct notifier_block *info,
unsigned long action, void *__cpu)
{
int node, cpu = (unsigned long)__cpu;
struct page *page;
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
node = cpu_to_mem(cpu);
per_cpu(cpu_profile_flip, cpu) = 0;
if (!per_cpu(cpu_profile_hits, cpu)[1]) {
page = alloc_pages_exact_node(node,
GFP_KERNEL | __GFP_ZERO,
0);
if (!page)
return notifier_from_errno(-ENOMEM);
per_cpu(cpu_profile_hits, cpu)[1] = page_address(page);
}
if (!per_cpu(cpu_profile_hits, cpu)[0]) {
page = alloc_pages_exact_node(node,
GFP_KERNEL | __GFP_ZERO,
0);
if (!page)
goto out_free;
per_cpu(cpu_profile_hits, cpu)[0] = page_address(page);
}
break;
out_free:
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[1]);
per_cpu(cpu_profile_hits, cpu)[1] = NULL;
__free_page(page);
return notifier_from_errno(-ENOMEM);
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
if (prof_cpu_mask != NULL)
cpumask_set_cpu(cpu, prof_cpu_mask);
break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
case CPU_DEAD_FROZEN:
if (prof_cpu_mask != NULL)
cpumask_clear_cpu(cpu, prof_cpu_mask);
if (per_cpu(cpu_profile_hits, cpu)[0]) {
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[0]);
per_cpu(cpu_profile_hits, cpu)[0] = NULL;
__free_page(page);
}
if (per_cpu(cpu_profile_hits, cpu)[1]) {
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[1]);
per_cpu(cpu_profile_hits, cpu)[1] = NULL;
__free_page(page);
}
break;
}
return NOTIFY_OK;
}
static int macvtap_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct macvtap_dev *vlantap;
struct device *classdev;
dev_t devt;
int err;
char tap_name[IFNAMSIZ];
if (dev->rtnl_link_ops != &macvtap_link_ops)
return NOTIFY_DONE;
snprintf(tap_name, IFNAMSIZ, "tap%d", dev->ifindex);
vlantap = netdev_priv(dev);
switch (event) {
case NETDEV_REGISTER:
/* Create the device node here after the network device has
* been registered but before register_netdevice has
* finished running.
*/
err = tap_get_minor(macvtap_major, &vlantap->tap);
if (err)
return notifier_from_errno(err);
devt = MKDEV(MAJOR(macvtap_major), vlantap->tap.minor);
classdev = device_create(&macvtap_class, &dev->dev, devt,
dev, tap_name);
if (IS_ERR(classdev)) {
tap_free_minor(macvtap_major, &vlantap->tap);
return notifier_from_errno(PTR_ERR(classdev));
}
err = sysfs_create_link(&dev->dev.kobj, &classdev->kobj,
tap_name);
if (err)
return notifier_from_errno(err);
break;
case NETDEV_UNREGISTER:
/* vlan->minor == 0 if NETDEV_REGISTER above failed */
if (vlantap->tap.minor == 0)
break;
sysfs_remove_link(&dev->dev.kobj, tap_name);
devt = MKDEV(MAJOR(macvtap_major), vlantap->tap.minor);
device_destroy(&macvtap_class, devt);
tap_free_minor(macvtap_major, &vlantap->tap);
break;
case NETDEV_CHANGE_TX_QUEUE_LEN:
if (tap_queue_resize(&vlantap->tap))
return NOTIFY_BAD;
break;
}
return NOTIFY_DONE;
}
static int
jump_label_module_notify(struct notifier_block *self, unsigned long val,
void *data)
{
struct module *mod = data;
int ret = 0;
cpus_read_lock();
jump_label_lock();
switch (val) {
case MODULE_STATE_COMING:
ret = jump_label_add_module(mod);
if (ret) {
WARN(1, "Failed to allocatote memory: jump_label may not work properly.\n");
jump_label_del_module(mod);
}
break;
case MODULE_STATE_GOING:
jump_label_del_module(mod);
break;
case MODULE_STATE_LIVE:
jump_label_invalidate_module_init(mod);
break;
}
jump_label_unlock();
cpus_read_unlock();
return notifier_from_errno(ret);
}
static int dsa_switch_event(struct notifier_block *nb,
unsigned long event, void *info)
{
struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb);
int err;
switch (event) {
case DSA_NOTIFIER_BRIDGE_JOIN:
err = dsa_switch_bridge_join(ds, info);
break;
case DSA_NOTIFIER_BRIDGE_LEAVE:
err = dsa_switch_bridge_leave(ds, info);
break;
default:
err = -EOPNOTSUPP;
break;
}
/* Non-switchdev operations cannot be rolled back. If a DSA driver
* returns an error during the chained call, switch chips may be in an
* inconsistent state.
*/
if (err)
dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n",
event, err);
return notifier_from_errno(err);
}
static int rockchip_clk_frac_notifier_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct clk_notifier_data *ndata = data;
struct rockchip_clk_frac *frac = to_rockchip_clk_frac_nb(nb);
struct clk_mux *frac_mux = &frac->mux;
int ret = 0;
pr_debug("%s: event %lu, old_rate %lu, new_rate: %lu\n",
__func__, event, ndata->old_rate, ndata->new_rate);
if (event == PRE_RATE_CHANGE) {
frac->rate_change_idx = frac->mux_ops->get_parent(&frac_mux->hw);
if (frac->rate_change_idx != frac->mux_frac_idx) {
frac->mux_ops->set_parent(&frac_mux->hw, frac->mux_frac_idx);
frac->rate_change_remuxed = 1;
}
} else if (event == POST_RATE_CHANGE) {
/*
* The POST_RATE_CHANGE notifier runs directly after the
* divider clock is set in clk_change_rate, so we'll have
* remuxed back to the original parent before clk_change_rate
* reaches the mux itself.
*/
if (frac->rate_change_remuxed) {
frac->mux_ops->set_parent(&frac_mux->hw, frac->rate_change_idx);
frac->rate_change_remuxed = 0;
}
}
return notifier_from_errno(ret);
}
static int __meminit page_ext_callback(struct notifier_block *self,
unsigned long action, void *arg)
{
struct memory_notify *mn = arg;
int ret = 0;
switch (action) {
case MEM_GOING_ONLINE:
ret = online_page_ext(mn->start_pfn,
mn->nr_pages, mn->status_change_nid);
break;
case MEM_OFFLINE:
offline_page_ext(mn->start_pfn,
mn->nr_pages, mn->status_change_nid);
break;
case MEM_CANCEL_ONLINE:
offline_page_ext(mn->start_pfn,
mn->nr_pages, mn->status_change_nid);
break;
case MEM_GOING_OFFLINE:
break;
case MEM_ONLINE:
case MEM_CANCEL_OFFLINE:
break;
}
return notifier_from_errno(ret);
}
static int fmem_memory_callback(struct notifier_block *self,
unsigned long action, void *arg)
{
int ret = 0;
if (fmem_state == FMEM_UNINITIALIZED)
return NOTIFY_OK;
switch (action) {
case MEM_ONLINE:
fmem_mem_online_callback(arg);
break;
case MEM_GOING_OFFLINE:
ret = fmem_mem_going_offline_callback(arg);
break;
case MEM_OFFLINE:
fmem_mem_offline_callback(arg);
break;
case MEM_GOING_ONLINE:
case MEM_CANCEL_ONLINE:
case MEM_CANCEL_OFFLINE:
break;
}
if (ret)
ret = notifier_from_errno(ret);
else
ret = NOTIFY_OK;
return ret;
}
static int
jump_label_module_notify(struct notifier_block *self, unsigned long val,
void *data)
{
struct module *mod = data;
int ret = 0;
switch (val) {
case MODULE_STATE_COMING:
jump_label_lock();
ret = jump_label_add_module(mod);
if (ret)
jump_label_del_module(mod);
jump_label_unlock();
break;
case MODULE_STATE_GOING:
jump_label_lock();
jump_label_del_module(mod);
jump_label_unlock();
break;
case MODULE_STATE_LIVE:
jump_label_lock();
jump_label_invalidate_module_init(mod);
jump_label_unlock();
break;
}
return notifier_from_errno(ret);
}
/*
* Notifier function for switching the muxes to safe parent
* while the hfpll is getting reprogrammed.
*/
static int krait_notifier_cb(struct notifier_block *nb,
unsigned long event,
void *data)
{
int ret = 0;
struct krait_mux_clk *mux = container_of(nb, struct krait_mux_clk,
clk_nb);
/* Switch to safe parent */
if (event == PRE_RATE_CHANGE) {
mux->old_index = krait_mux_clk_ops.get_parent(&mux->hw);
ret = krait_mux_clk_ops.set_parent(&mux->hw, mux->safe_sel);
mux->reparent = false;
/*
* By the time POST_RATE_CHANGE notifier is called,
* clk framework itself would have changed the parent for the new rate.
* Only otherwise, put back to the old parent.
*/
} else if (event == POST_RATE_CHANGE) {
if (!mux->reparent)
ret = krait_mux_clk_ops.set_parent(&mux->hw,
mux->old_index);
}
return notifier_from_errno(ret);
}
static int tz_notify(struct notifier_block *nb, unsigned long type, void *devp)
{
int result = 0;
struct devfreq *devfreq = devp;
switch (type) {
case ADRENO_DEVFREQ_NOTIFY_IDLE:
case ADRENO_DEVFREQ_NOTIFY_RETIRE:
mutex_lock(&devfreq->lock);
result = update_devfreq(devfreq);
mutex_unlock(&devfreq->lock);
/* Nofifying partner bus governor if any */
if (partner_gpu_profile && partner_gpu_profile->bus_devfreq) {
mutex_lock(&partner_gpu_profile->bus_devfreq->lock);
update_devfreq(partner_gpu_profile->bus_devfreq);
mutex_unlock(&partner_gpu_profile->bus_devfreq->lock);
}
break;
/* ignored by this governor */
case ADRENO_DEVFREQ_NOTIFY_SUBMIT:
default:
break;
}
return notifier_from_errno(result);
}
static int otg_notifier_callback(struct notifier_block *nb,
unsigned long event, void *param)
{
struct otg_state_work *state_work;
pr_info("%s event=%s(%lu)\n", __func__,
event_string(event), event);
if (!u_notify) {
pr_err("u_notify is NULL\n");
return NOTIFY_DONE;
}
if (event > NOTIFY_EVENT_VBUSPOWER) {
pr_err("%s event is invalid\n", __func__);
return NOTIFY_DONE;
}
state_work = kmalloc(sizeof(struct otg_state_work), GFP_ATOMIC);
if (!state_work) {
pr_err("unable to allocate state_work\n");
return notifier_from_errno(-ENOMEM);
}
INIT_WORK(&state_work->otg_work, otg_notify_work);
state_work->event = event;
state_work->enable = *(int *)param;
queue_work(u_notify->notifier_wq, &state_work->otg_work);
return NOTIFY_OK;
}
static int update_clusterinfo(
struct notifier_block *nfb, unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
int err = 0;
switch (action) {
case CPU_UP_PREPARE:
per_cpu(cpu_2_logical_apicid, cpu) = BAD_APICID;
if ( !cluster_cpus_spare )
cluster_cpus_spare = xzalloc(cpumask_t);
if ( !cluster_cpus_spare ||
!alloc_cpumask_var(&per_cpu(scratch_mask, cpu)) )
err = -ENOMEM;
break;
case CPU_UP_CANCELED:
case CPU_DEAD:
if ( per_cpu(cluster_cpus, cpu) )
{
cpumask_clear_cpu(cpu, per_cpu(cluster_cpus, cpu));
if ( cpumask_empty(per_cpu(cluster_cpus, cpu)) )
xfree(per_cpu(cluster_cpus, cpu));
}
free_cpumask_var(per_cpu(scratch_mask, cpu));
break;
}
return !err ? NOTIFY_DONE : notifier_from_errno(err);
}
/**
* cmm_memory_isolate_cb - Handle memory isolation notifier calls
* @self: notifier block struct
* @action: action to take
* @arg: struct memory_isolate_notify data for handler
*
* Return value:
* NOTIFY_OK or notifier error based on subfunction return value
**/
static int cmm_memory_isolate_cb(struct notifier_block *self,
unsigned long action, void *arg)
{
int ret = 0;
if (action == MEM_ISOLATE_COUNT)
ret = cmm_count_pages(arg);
return notifier_from_errno(ret);
}
/*
* We use the notifier function for switching to a temporary safe configuration
* (mux and divider), while the A53 PLL is reconfigured.
*/
static int a53cc_notifier_cb(struct notifier_block *nb, unsigned long event,
void *data)
{
int ret = 0;
struct clk_regmap_mux_div *md = container_of(nb,
struct clk_regmap_mux_div,
clk_nb);
if (event == PRE_RATE_CHANGE)
/* set the mux and divider to safe frequency (400mhz) */
ret = mux_div_set_src_div(md, 4, 3);
return notifier_from_errno(ret);
}
/*
* This clock notifier is called when the frequency of the of the parent
* PLL clock is to be changed. We use the xtal input as temporary parent
* while the PLL frequency is stabilized.
*/
static int meson_clk_cpu_notifier_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct clk_notifier_data *ndata = data;
struct meson_clk_cpu *clk_cpu = to_meson_clk_cpu_nb(nb);
int ret = 0;
if (event == PRE_RATE_CHANGE)
ret = meson_clk_cpu_pre_rate_change(clk_cpu, ndata);
else if (event == POST_RATE_CHANGE)
ret = meson_clk_cpu_post_rate_change(clk_cpu, ndata);
return notifier_from_errno(ret);
}
static int omap2430_musb_otg_notifications
(struct musb *musb, unsigned long event)
{
struct musb_otg_work *otg_work;
otg_work = kmalloc(sizeof(struct musb_otg_work), GFP_ATOMIC);
if (!otg_work)
return notifier_from_errno(-ENOMEM);
INIT_WORK(&otg_work->work, musb_otg_notifier_work);
otg_work->xceiv_event = event;
otg_work->musb = musb;
pr_info("%s recheck event=%lu\n", __func__, event);
queue_work(musb->otg_notifier_wq, &otg_work->work);
return 0;
}
static int musb_otg_notifications(struct notifier_block *nb,
unsigned long event, void *unused)
{
struct musb *musb = container_of(nb, struct musb, nb);
struct musb_otg_work *otg_work;
otg_work = kmalloc(sizeof(struct musb_otg_work), GFP_ATOMIC);
if (!otg_work)
return notifier_from_errno(-ENOMEM);
INIT_WORK(&otg_work->work, musb_otg_notifier_work);
otg_work->xceiv_event = event;
otg_work->musb = musb;
queue_work(musb->otg_notifier_wq, &otg_work->work);
return 0;
}
static int comp_pool_callback(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
struct ehca_cpu_comp_task *cct;
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_PREPARE)", cpu);
if (!create_comp_task(pool, cpu)) {
ehca_gen_err("Can't create comp_task for cpu: %x", cpu);
return notifier_from_errno(-ENOMEM);
}
break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_CANCELED)", cpu);
cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
kthread_bind(cct->task, cpumask_any(cpu_online_mask));
destroy_comp_task(pool, cpu);
break;
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_ONLINE)", cpu);
cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
kthread_bind(cct->task, cpu);
wake_up_process(cct->task);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_DOWN_PREPARE)", cpu);
break;
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_DOWN_FAILED)", cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_DEAD)", cpu);
destroy_comp_task(pool, cpu);
take_over_work(pool, cpu);
break;
}
return NOTIFY_OK;
}
static int of_i2c_notify(struct notifier_block *nb, unsigned long action,
void *arg)
{
struct of_reconfig_data *rd = arg;
struct i2c_adapter *adap;
struct i2c_client *client;
switch (of_reconfig_get_state_change(action, rd)) {
case OF_RECONFIG_CHANGE_ADD:
adap = of_find_i2c_adapter_by_node(rd->dn->parent);
if (adap == NULL)
return NOTIFY_OK; /* not for us */
if (of_node_test_and_set_flag(rd->dn, OF_POPULATED)) {
put_device(&adap->dev);
return NOTIFY_OK;
}
client = of_i2c_register_device(adap, rd->dn);
put_device(&adap->dev);
if (IS_ERR(client)) {
dev_err(&adap->dev, "failed to create client for '%pOF'\n",
rd->dn);
of_node_clear_flag(rd->dn, OF_POPULATED);
return notifier_from_errno(PTR_ERR(client));
}
break;
case OF_RECONFIG_CHANGE_REMOVE:
/* already depopulated? */
if (!of_node_check_flag(rd->dn, OF_POPULATED))
return NOTIFY_OK;
/* find our device by node */
client = of_find_i2c_device_by_node(rd->dn);
if (client == NULL)
return NOTIFY_OK; /* no? not meant for us */
/* unregister takes one ref away */
i2c_unregister_device(client);
/* and put the reference of the find */
put_device(&client->dev);
break;
}
return NOTIFY_OK;
}
/*
* This clock notifier is called when the frequency of the parent clock
* of cpuclk is to be changed. This notifier handles the setting up all
* the divider clocks, remux to temporary parent and handling the safe
* frequency levels when using temporary parent.
*/
static int rockchip_cpuclk_notifier_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct clk_notifier_data *ndata = data;
struct rockchip_cpuclk *cpuclk = to_rockchip_cpuclk_nb(nb);
int ret = 0;
pr_debug("%s: event %lu, old_rate %lu, new_rate: %lu\n",
__func__, event, ndata->old_rate, ndata->new_rate);
if (event == PRE_RATE_CHANGE)
ret = rockchip_cpuclk_pre_rate_change(cpuclk, ndata);
else if (event == POST_RATE_CHANGE)
ret = rockchip_cpuclk_post_rate_change(cpuclk, ndata);
return notifier_from_errno(ret);
}
static int gpu_lpc_notifier(struct notifier_block *nb, unsigned long event, void *cmd)
{
struct kbase_device *kbdev = pkbdev;
int err = NOTIFY_DONE;
unsigned long flags;
switch (event) {
case LPC_PREPARE:
spin_lock_irqsave(&kbdev->pm.metrics.lock, flags);
if(kbdev->pm.metrics.gpu_active)
err = notifier_from_errno(-EBUSY);
spin_unlock_irqrestore(&kbdev->pm.metrics.lock, flags);
GPU_LOG(DVFS_INFO, DUMMY, 0u, 0u, "LPC prepare\n");
break;
}
return err;
}
static int __cpuinit msr_class_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
int err = 0;
switch (action) {
case CPU_UP_PREPARE:
err = msr_device_create(cpu);
break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
msr_device_destroy(cpu);
break;
}
return notifier_from_errno(err);
}
static int tz_notify(struct notifier_block *nb, unsigned long type, void *devp)
{
int result = 0;
struct devfreq *devfreq = devp;
switch (type) {
case ADRENO_DEVFREQ_NOTIFY_IDLE:
case ADRENO_DEVFREQ_NOTIFY_RETIRE:
mutex_lock(&devfreq->lock);
result = update_devfreq(devfreq);
mutex_unlock(&devfreq->lock);
break;
/* ignored by this governor */
case ADRENO_DEVFREQ_NOTIFY_SUBMIT:
default:
break;
}
return notifier_from_errno(result);
}
static int pseries_memory_notifier(struct notifier_block *nb,
unsigned long action, void *node)
{
int err = 0;
switch (action) {
case PSERIES_RECONFIG_ADD:
err = pseries_add_memory(node);
break;
case PSERIES_RECONFIG_REMOVE:
err = pseries_remove_memory(node);
break;
case PSERIES_DRCONF_MEM_ADD:
case PSERIES_DRCONF_MEM_REMOVE:
err = pseries_drconf_memory(node, action);
break;
}
return notifier_from_errno(err);
}
static int err_inject_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
int err = 0;
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
err = cpu_up_prepare_error;
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
err = cpu_down_prepare_error;
break;
}
if (err)
printk(KERN_INFO "Injecting error (%d) at cpu notifier\n", err);
return notifier_from_errno(err);
}
static int pseries_memory_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct of_reconfig_data *rd = data;
int err = 0;
switch (action) {
case OF_RECONFIG_ATTACH_NODE:
err = pseries_add_mem_node(rd->dn);
break;
case OF_RECONFIG_DETACH_NODE:
err = pseries_remove_mem_node(rd->dn);
break;
case OF_RECONFIG_UPDATE_PROPERTY:
if (!strcmp(rd->prop->name, "ibm,dynamic-memory"))
err = pseries_update_drconf_memory(rd);
break;
}
return notifier_from_errno(err);
}
static int topology_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
int rc = 0;
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
rc = topology_add_dev(cpu);
break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
case CPU_DEAD_FROZEN:
topology_remove_dev(cpu);
break;
}
return notifier_from_errno(rc);
}
static int pseries_memory_notifier(struct notifier_block *nb,
unsigned long action, void *node)
{
struct of_prop_reconfig *pr;
int err = 0;
switch (action) {
case OF_RECONFIG_ATTACH_NODE:
err = pseries_add_memory(node);
break;
case OF_RECONFIG_DETACH_NODE:
err = pseries_remove_memory(node);
break;
case OF_RECONFIG_UPDATE_PROPERTY:
pr = (struct of_prop_reconfig *)node;
if (!strcmp(pr->prop->name, "ibm,dynamic-memory"))
err = pseries_update_drconf_memory(pr);
break;
}
return notifier_from_errno(err);
}
/**
* cmm_memory_cb - Handle memory hotplug notifier calls
* @self: notifier block struct
* @action: action to take
* @arg: struct memory_notify data for handler
*
* Return value:
* NOTIFY_OK or notifier error based on subfunction return value
*
**/
static int cmm_memory_cb(struct notifier_block *self,
unsigned long action, void *arg)
{
int ret = 0;
switch (action) {
case MEM_GOING_OFFLINE:
mutex_lock(&hotplug_mutex);
hotplug_occurred = 1;
ret = cmm_mem_going_offline(arg);
break;
case MEM_OFFLINE:
case MEM_CANCEL_OFFLINE:
mutex_unlock(&hotplug_mutex);
cmm_dbg("Memory offline operation complete.\n");
break;
case MEM_GOING_ONLINE:
case MEM_ONLINE:
case MEM_CANCEL_ONLINE:
break;
}
return notifier_from_errno(ret);
}
