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rapidio/rionet: add mport removal handling

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Add handling of a local mport device removal.

RIONET driver registers itself as class interface that supports only
removal notification, 'add_device' callback is not provided because
RIONET network device can be initialized only after enumeration is
completed and the existing method (using remote peer addition) satisfies
this condition.

Signed-off-by: Alexandre 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexandre Bounine 2016-03-22 14:26:32 -07:00 committed by Linus Torvalds
parent 34ed2ebb65
commit b7dfca8bd4
1 changed files with 44 additions and 26 deletions
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70
drivers/net/rionet.c
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@ -676,6 +676,34 @@ static int rionet_shutdown(struct notifier_block *nb, unsigned long code,
return NOTIFY_DONE;
}
static void rionet_remove_mport(struct device *dev,
struct class_interface *class_intf)
{
struct rio_mport *mport = to_rio_mport(dev);
struct net_device *ndev;
int id = mport->id;
pr_debug("%s %s\n", __func__, mport->name);
WARN(nets[id].nact, "%s called when connected to %d peers\n",
__func__, nets[id].nact);
WARN(!nets[id].ndev, "%s called for mport without NDEV\n",
__func__);
if (nets[id].ndev) {
ndev = nets[id].ndev;
netif_stop_queue(ndev);
unregister_netdev(ndev);
free_pages((unsigned long)nets[id].active,
get_order(sizeof(void *) *
RIO_MAX_ROUTE_ENTRIES(mport->sys_size)));
nets[id].active = NULL;
free_netdev(ndev);
nets[id].ndev = NULL;
}
}
#ifdef MODULE
static struct rio_device_id rionet_id_table[] = {
{RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)},
@ -696,6 +724,13 @@ static struct notifier_block rionet_notifier = {
.notifier_call = rionet_shutdown,
};
/* the rio_mport_interface is used to handle local mport devices */
static struct class_interface rio_mport_interface __refdata = {
.class = &rio_mport_class,
.add_dev = NULL,
.remove_dev = rionet_remove_mport,
};
static int __init rionet_init(void)
{
int ret;
@ -706,39 +741,22 @@ static int __init rionet_init(void)
DRV_NAME, ret);
return ret;
}
ret = class_interface_register(&rio_mport_interface);
if (ret) {
pr_err("%s: class_interface_register error: %d\n",
DRV_NAME, ret);
return ret;
}
return subsys_interface_register(&rionet_interface);
}
static void __exit rionet_exit(void)
{
struct rionet_private *rnet;
struct net_device *ndev;
struct rionet_peer *peer, *tmp;
int i;
for (i = 0; i < RIONET_MAX_NETS; i++) {
if (nets[i].ndev != NULL) {
ndev = nets[i].ndev;
rnet = netdev_priv(ndev);
unregister_netdev(ndev);
list_for_each_entry_safe(peer,
tmp, &nets[i].peers, node) {
list_del(&peer->node);
kfree(peer);
}
free_pages((unsigned long)nets[i].active,
get_order(sizeof(void *) *
RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size)));
nets[i].active = NULL;
free_netdev(ndev);
}
}
unregister_reboot_notifier(&rionet_notifier);
subsys_interface_unregister(&rionet_interface);
class_interface_unregister(&rio_mport_interface);
}
late_initcall(rionet_init);