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Commit 2a6f4e49 authored by Jan-Bernd Themann's avatar Jan-Bernd Themann Committed by Jeff Garzik
Browse files

ehea: add kexec support 



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: default avatarJan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent f920c186

drivers/net/ehea/ehea.h

+1 −1
Original line number Diff line number Diff line
@@ -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

drivers/net/ehea/ehea_main.c

+21 −0
Original line number Diff line number Diff line
@@ -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();

}