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iwmc3200wifi: add iwm_if_add and iwm_if_remove

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We used to do alloc_netdev and register_netdev at the same time in
iwm_if_alloc. But some bus related structures will only be initialized
after iwm_priv is allocated. This caused a race condition that the
netdev might be registered earlier. The patch adds iwm_if_add and
iwm_if_remove so that the bus layer could register the device after
all initialization is done.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: Samuel Ortiz <samuel.ortiz@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Zhu Yi 2009-06-15 21:36:14 +02:00 committed by John W. Linville
parent 8d96e7960b
commit d7e057dca3
3 changed files with 31 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/net/wireless/iwmc3200wifi/iwm.h
View file

@ -315,6 +315,8 @@ extern const struct iw_handler_def iwm_iw_handler_def;
void *iwm_if_alloc(int sizeof_bus, struct device *dev,
struct iwm_if_ops *if_ops);
void iwm_if_free(struct iwm_priv *iwm);
int iwm_if_add(struct iwm_priv *iwm);
void iwm_if_remove(struct iwm_priv *iwm);
int iwm_mode_to_nl80211_iftype(int mode);
int iwm_priv_init(struct iwm_priv *iwm);
void iwm_priv_deinit(struct iwm_priv *iwm);

32
drivers/net/wireless/iwmc3200wifi/netdev.c
View file

@ -123,8 +123,7 @@ void *iwm_if_alloc(int sizeof_bus, struct device *dev,
wdev->iftype = iwm_mode_to_nl80211_iftype(iwm->conf.mode);
ndev = alloc_netdev_mq(0, "wlan%d", ether_setup,
IWM_TX_QUEUES);
ndev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
if (!ndev) {
dev_err(dev, "no memory for network device instance\n");
goto out_priv;
@ -134,19 +133,10 @@ void *iwm_if_alloc(int sizeof_bus, struct device *dev,
ndev->wireless_handlers = &iwm_iw_handler_def;
ndev->ieee80211_ptr = wdev;
SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
ret = register_netdev(ndev);
if (ret < 0) {
dev_err(dev, "Failed to register netdev: %d\n", ret);
goto out_ndev;
}
wdev->netdev = ndev;
return iwm;
out_ndev:
free_netdev(ndev);
out_priv:
iwm_priv_deinit(iwm);
@ -160,8 +150,26 @@ void iwm_if_free(struct iwm_priv *iwm)
if (!iwm_to_ndev(iwm))
return;
unregister_netdev(iwm_to_ndev(iwm));
free_netdev(iwm_to_ndev(iwm));
iwm_wdev_free(iwm);
iwm_priv_deinit(iwm);
}
int iwm_if_add(struct iwm_priv *iwm)
{
struct net_device *ndev = iwm_to_ndev(iwm);
int ret;
ret = register_netdev(ndev);
if (ret < 0) {
dev_err(&ndev->dev, "Failed to register netdev: %d\n", ret);
return ret;
}
return 0;
}
void iwm_if_remove(struct iwm_priv *iwm)
{
unregister_netdev(iwm_to_ndev(iwm));
}

9
drivers/net/wireless/iwmc3200wifi/sdio.c
View file

@ -454,10 +454,18 @@ static int iwm_sdio_probe(struct sdio_func *func,
INIT_WORK(&hw->isr_worker, iwm_sdio_isr_worker);
ret = iwm_if_add(iwm);
if (ret) {
dev_err(dev, "add SDIO interface failed\n");
goto destroy_wq;
}
dev_info(dev, "IWM SDIO probe\n");
return 0;
destroy_wq:
destroy_workqueue(hw->isr_wq);
debugfs_exit:
iwm_debugfs_exit(iwm);
if_free:
@ -472,6 +480,7 @@ static void iwm_sdio_remove(struct sdio_func *func)
struct device *dev = &func->dev;
iwm_debugfs_exit(iwm);
iwm_if_remove(iwm);
iwm_if_free(iwm);
destroy_workqueue(hw->isr_wq);