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Subject[PATCH 2/2] ehea: add memory remove hotplug support
Date
Add memory remove hotplug support

Signed-off-by: Jan-Bernd Themann <themann@de.ibm.com>

---
Comment: This patch depends on the following patch that
exports the symbols
register_memory_notifier()
unregister_memory_notifier()

http://lkml.org/lkml/2008/2/1/293


drivers/net/ehea/ehea_main.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index 21af674..b75afcc 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -35,6 +35,7 @@
#include <linux/if_ether.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
+#include <linux/memory.h>
#include <asm/kexec.h>

#include <net/ip.h>
@@ -3480,6 +3481,24 @@ void ehea_crash_handler(void)
0, H_DEREG_BCMC);
}

+static int ehea_mem_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ switch (action) {
+ case MEM_OFFLINE:
+ ehea_info("memory has been removed");
+ ehea_rereg_mrs(NULL);
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block ehea_mem_nb = {
+ .notifier_call = ehea_mem_notifier,
+};
+
static int ehea_reboot_notifier(struct notifier_block *nb,
unsigned long action, void *unused)
{
@@ -3559,6 +3578,10 @@ int __init ehea_module_init(void)
if (ret)
ehea_info("failed registering reboot notifier");

+ ret = register_memory_notifier(&ehea_mem_nb);
+ if (ret)
+ ehea_info("failed registering memory remove notifier");
+
ret = crash_shutdown_register(&ehea_crash_handler);
if (ret)
ehea_info("failed registering crash handler");
@@ -3582,6 +3605,7 @@ int __init ehea_module_init(void)
out3:
ibmebus_unregister_driver(&ehea_driver);
out2:
+ unregister_memory_notifier(&ehea_mem_nb);
unregister_reboot_notifier(&ehea_reboot_nb);
crash_shutdown_unregister(&ehea_crash_handler);
out:
@@ -3599,6 +3623,7 @@ static void __exit ehea_module_exit(void)
ret = crash_shutdown_unregister(&ehea_crash_handler);
if (ret)
ehea_info("failed unregistering crash handler");
+ unregister_memory_notifier(&ehea_mem_nb);
kfree(ehea_fw_handles.arr);
kfree(ehea_bcmc_regs.arr);
ehea_destroy_busmap();
--
1.5.2


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