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authorStefan Richter <stefanr@s5r6.in-berlin.de>2009-06-16 22:43:55 +0400
committerStefan Richter <stefanr@s5r6.in-berlin.de>2009-06-17 00:48:09 +0400
commitb01b4babbf204443b5a846a7494546501614cefc (patch)
tree7488129b4e41cde0b614d8f999064fc33fd211ca /drivers/firewire
parentd645f4dad056a98089df904294f66b96d04e91b6 (diff)
downloadlinux-b01b4babbf204443b5a846a7494546501614cefc.tar.xz
firewire: net: fix card driver reloading
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>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/net.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c
index 95e35a36b01f..47dcb45d720e 100644
--- a/drivers/firewire/net.c
+++ b/drivers/firewire/net.c
@@ -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;