eHEA resources that are allocated via H_CALLs have a unique identifier each.
These identifiers are necessary to free the resources. A reboot notifier
is used to free all eHEA resources before the indentifiers get lost, i.e
before kexec starts a new kernel.
Signed-off-by: Jan-Bernd Themann <[email protected]>
---
drivers/net/ehea/ehea.h | 2 +-
drivers/net/ehea/ehea_main.c | 21 +++++++++++++++++++++
2 files changed, 22 insertions(+), 1 deletions(-)
diff --git a/drivers/net/ehea/ehea.h b/drivers/net/ehea/ehea.h
index 4b4b74e..f78e5bf 100644
--- a/drivers/net/ehea/ehea.h
+++ b/drivers/net/ehea/ehea.h
@@ -40,7 +40,7 @@
#include <asm/io.h>
#define DRV_NAME "ehea"
-#define DRV_VERSION "EHEA_0079"
+#define DRV_VERSION "EHEA_0080"
/* eHEA capability flags */
#define DLPAR_PORT_ADD_REM 1
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index 0a7e789..f0319f1 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -33,6 +33,9 @@
#include <linux/if.h>
#include <linux/list.h>
#include <linux/if_ether.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+
#include <net/ip.h>
#include "ehea.h"
@@ -3295,6 +3298,20 @@ static int __devexit ehea_remove(struct of_device *dev)
return 0;
}
+static int ehea_reboot_notifier(struct notifier_block *nb,
+ unsigned long action, void *unused)
+{
+ if (action == SYS_RESTART) {
+ ehea_info("Reboot: freeing all eHEA resources");
+ ibmebus_unregister_driver(&ehea_driver);
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block ehea_reboot_nb = {
+ .notifier_call = ehea_reboot_notifier,
+};
+
static int check_module_parm(void)
{
int ret = 0;
@@ -3351,6 +3368,8 @@ int __init ehea_module_init(void)
if (ret)
goto out;
+ register_reboot_notifier(&ehea_reboot_nb);
+
ret = ibmebus_register_driver(&ehea_driver);
if (ret) {
ehea_error("failed registering eHEA device driver on ebus");
@@ -3362,6 +3381,7 @@ int __init ehea_module_init(void)
if (ret) {
ehea_error("failed to register capabilities attribute, ret=%d",
ret);
+ unregister_reboot_notifier(&ehea_reboot_nb);
ibmebus_unregister_driver(&ehea_driver);
goto out;
}
@@ -3375,6 +3395,7 @@ static void __exit ehea_module_exit(void)
flush_scheduled_work();
driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
ibmebus_unregister_driver(&ehea_driver);
+ unregister_reboot_notifier(&ehea_reboot_nb);
ehea_destroy_busmap();
}
--
1.5.2
-
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