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mac80211: allow no mac address until firmware load

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Originally by Johannes Berg. This patch adds support for devices that do not
report their MAC address until the firmware is loaded. While the address is not
known, a multicast on is used.

Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis Carlos Cobo 2008-08-14 10:40:48 -07:00 committed by John W. Linville
parent 4eb2ae9a42
commit bdbe819540
1 changed files with 38 additions and 0 deletions
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38
net/mac80211/main.c
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@ -187,9 +187,15 @@ static int ieee80211_open(struct net_device *dev)
u32 changed = 0;
int res;
bool need_hw_reconfig = 0;
u8 null_addr[ETH_ALEN] = {0};
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
/* fail early if user set an invalid address */
if (compare_ether_addr(dev->dev_addr, null_addr) &&
!is_valid_ether_addr(dev->dev_addr))
return -EADDRNOTAVAIL;
/* we hold the RTNL here so can safely walk the list */
list_for_each_entry(nsdata, &local->interfaces, list) {
struct net_device *ndev = nsdata->dev;
@ -270,6 +276,36 @@ static int ieee80211_open(struct net_device *dev)
ieee80211_led_radio(local, local->hw.conf.radio_enabled);
}
/*
* Check all interfaces and copy the hopefully now-present
* MAC address to those that have the special null one.
*/
list_for_each_entry(nsdata, &local->interfaces, list) {
struct net_device *ndev = nsdata->dev;
/*
* No need to check netif_running since we do not allow
* it to start up with this invalid address.
*/
if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
memcpy(ndev->dev_addr,
local->hw.wiphy->perm_addr,
ETH_ALEN);
}
if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
ETH_ALEN);
/*
* Validate the MAC address for this device.
*/
if (!is_valid_ether_addr(dev->dev_addr)) {
if (!local->open_count && local->ops->stop)
local->ops->stop(local_to_hw(local));
return -EADDRNOTAVAIL;
}
switch (sdata->vif.type) {
case IEEE80211_IF_TYPE_VLAN:
/* no need to tell driver */
@ -975,6 +1011,8 @@ void ieee80211_if_setup(struct net_device *dev)
dev->open = ieee80211_open;
dev->stop = ieee80211_stop;
dev->destructor = free_netdev;
/* we will validate the address ourselves in ->open */
dev->validate_addr = NULL;
}
/* everything else */