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firewire: net: fix card driver reloading

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Fix some problems from "firewire: net: allow for unordered unit
discovery":
  - fwnet_remove was missing a list_del, causing fwnet_probe to crash if
    called after fwnet_remove, e.g. if firewire-ohci was unloaded and
    reloaded.
  - fwnet_probe should set its new_netdev flag only if it actually
    allocated a net_device.
  - Use dev_set_drvdata and dev_get_drvdata instead of deprecated direct
    access to device.driver_data.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2009-06-16 20:43:55 +02:00
parent d645f4dad0
commit b01b4babbf
1 changed files with 10 additions and 8 deletions
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18
drivers/firewire/net.c
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@ -1390,7 +1390,8 @@ static int fwnet_add_peer(struct fwnet_device *dev,
if (!peer)
return -ENOMEM;
unit->device.driver_data = peer;
dev_set_drvdata(&unit->device, peer);
peer->dev = dev;
peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
peer->fifo = FWNET_NO_FIFO_ADDR;
@ -1417,27 +1418,26 @@ static int fwnet_probe(struct device *_dev)
struct fw_device *device = fw_parent_device(unit);
struct fw_card *card = device->card;
struct net_device *net;
bool allocated_netdev = false;
struct fwnet_device *dev;
unsigned max_mtu;
bool new_netdev;
int ret;
mutex_lock(&fwnet_device_mutex);
dev = fwnet_dev_find(card);
if (dev) {
new_netdev = false;
net = dev->netdev;
goto have_dev;
}
new_netdev = true;
net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev);
if (net == NULL) {
ret = -ENOMEM;
goto out;
}
allocated_netdev = true;
SET_NETDEV_DEV(net, card->device);
dev = netdev_priv(net);
@ -1479,12 +1479,12 @@ static int fwnet_probe(struct device *_dev)
net->name, (unsigned long long)card->guid);
have_dev:
ret = fwnet_add_peer(dev, unit, device);
if (ret && new_netdev) {
if (ret && allocated_netdev) {
unregister_netdev(net);
list_del(&dev->dev_link);
}
out:
if (ret && new_netdev)
if (ret && allocated_netdev)
free_netdev(net);
mutex_unlock(&fwnet_device_mutex);
@ -1508,7 +1508,7 @@ static void fwnet_remove_peer(struct fwnet_peer *peer)
static int fwnet_remove(struct device *_dev)
{
struct fwnet_peer *peer = _dev->driver_data;
struct fwnet_peer *peer = dev_get_drvdata(_dev);
struct fwnet_device *dev = peer->dev;
struct net_device *net;
struct fwnet_packet_task *ptask, *pt_next;
@ -1544,6 +1544,8 @@ static int fwnet_remove(struct device *_dev)
dev_kfree_skb_any(ptask->skb);
kmem_cache_free(fwnet_packet_task_cache, ptask);
}
list_del(&dev->dev_link);
free_netdev(net);
}
@ -1559,7 +1561,7 @@ static int fwnet_remove(struct device *_dev)
static void fwnet_update(struct fw_unit *unit)
{
struct fw_device *device = fw_parent_device(unit);
struct fwnet_peer *peer = unit->device.driver_data;
struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
int generation;
generation = device->generation;