ehea: Fix memory hotplug support
This patch implements the memory notifier to update the busmap
instantly instead of rebuilding the whole map. This is necessary
because walk_memory_resource provides different information than
required during memory hotplug.
Signed-off-by: Hannes Hering <hering2@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index b70c531..422fcb9 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -2863,7 +2863,7 @@
struct ehea_adapter *adapter;
mutex_lock(&dlpar_mem_lock);
- ehea_info("LPAR memory enlarged - re-initializing driver");
+ ehea_info("LPAR memory changed - re-initializing driver");
list_for_each_entry(adapter, &adapter_list, list)
if (adapter->active_ports) {
@@ -2900,13 +2900,6 @@
}
}
- ehea_destroy_busmap();
- ret = ehea_create_busmap();
- if (ret) {
- ehea_error("creating ehea busmap failed");
- goto out;
- }
-
clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
list_for_each_entry(adapter, &adapter_list, list)
@@ -3519,9 +3512,21 @@
static int ehea_mem_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
+ struct memory_notify *arg = data;
switch (action) {
- case MEM_OFFLINE:
- ehea_info("memory has been removed");
+ case MEM_CANCEL_OFFLINE:
+ ehea_info("memory offlining canceled");
+ /* Readd canceled memory block */
+ case MEM_ONLINE:
+ ehea_info("memory is going online");
+ if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
+ return NOTIFY_BAD;
+ ehea_rereg_mrs(NULL);
+ break;
+ case MEM_GOING_OFFLINE:
+ ehea_info("memory is going offline");
+ if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
+ return NOTIFY_BAD;
ehea_rereg_mrs(NULL);
break;
default: