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Commit f41e2472 authored by Alexandre Bounine's avatar Alexandre Bounine Committed by Linus Torvalds
Browse files

rapidio/rionet: add shutdown event handling 



Add shutdown notification handler which terminates active connections
with remote RapidIO nodes.  This prevents remote nodes from sending
packets to the powered off node and eliminates hardware error events on
remote nodes.

Signed-off-by: default avatarAlexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e3dd8cd4

drivers/net/rionet.c

+38 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/skbuff.h>

#include <linux/crc32.h>

#include <linux/ethtool.h>

#include <linux/reboot.h>



#define DRV_NAME        "rionet"

#define DRV_VERSION     "0.3"
@@ -599,6 +600,30 @@ static int rionet_add_dev(struct device *dev, struct subsys_interface *sif) 
	return rc;

}



static int rionet_shutdown(struct notifier_block *nb, unsigned long code,

			   void *unused)

{

	struct rionet_peer *peer, *tmp;

	int i;



	pr_debug("%s: %s\n", DRV_NAME, __func__);



	for (i = 0; i < RIONET_MAX_NETS; i++) {

		if (!nets[i].ndev)

			continue;



		list_for_each_entry_safe(peer, tmp, &nets[i].peers, node) {

			if (nets[i].active[peer->rdev->destid]) {

				rio_send_doorbell(peer->rdev,

						  RIONET_DOORBELL_LEAVE);

				nets[i].active[peer->rdev->destid] = NULL;

			}

		}

	}



	return NOTIFY_DONE;

}



#ifdef MODULE

static struct rio_device_id rionet_id_table[] = {

	{RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)},
@@ -615,8 +640,20 @@ static struct subsys_interface rionet_interface = { 
	.remove_dev	= rionet_remove_dev,

};



static struct notifier_block rionet_notifier = {

	.notifier_call = rionet_shutdown,

};



static int __init rionet_init(void)

{

	int ret;



	ret = register_reboot_notifier(&rionet_notifier);

	if (ret) {

		pr_err("%s: failed to register reboot notifier (err=%d)\n",

		       DRV_NAME, ret);

		return ret;

	}

	return subsys_interface_register(&rionet_interface);

}
@@ -648,6 +685,7 @@ static void __exit rionet_exit(void) 
		}

	}



	unregister_reboot_notifier(&rionet_notifier);

	subsys_interface_unregister(&rionet_interface);

}