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authorDavid S. Miller <davem@davemloft.net>2010-07-01 17:34:14 -0700
committerDavid S. Miller <davem@davemloft.net>2010-07-01 17:34:14 -0700
commit05318bc905467237d4aa68a701f6e92a2b332218 (patch)
tree3b7577383bca50aeb442568aa16cf8f2167b8694 /drivers/net/wireless/at76c50x-usb.c
parentea812ca1b06113597adcd8e70c0f84a413d97544 (diff)
parent88c1f4f6dffe66e2fed8e7e3276e091ee850bed0 (diff)
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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6
Conflicts: drivers/net/wireless/libertas/host.h
Diffstat (limited to 'drivers/net/wireless/at76c50x-usb.c')
-rw-r--r--drivers/net/wireless/at76c50x-usb.c108
1 files changed, 72 insertions, 36 deletions
diff --git a/drivers/net/wireless/at76c50x-usb.c b/drivers/net/wireless/at76c50x-usb.c
index 429b281..cd8caea 100644
--- a/drivers/net/wireless/at76c50x-usb.c
+++ b/drivers/net/wireless/at76c50x-usb.c
@@ -7,6 +7,7 @@
* Copyright (c) 2004 Balint Seeber <n0_5p4m_p13453@hotmail.com>
* Copyright (c) 2007 Guido Guenther <agx@sigxcpu.org>
* Copyright (c) 2007 Kalle Valo <kalle.valo@iki.fi>
+ * Copyright (c) 2010 Sebastian Smolorz <sesmo@gmx.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@@ -1649,6 +1650,58 @@ exit:
return NULL;
}
+static int at76_join(struct at76_priv *priv)
+{
+ struct at76_req_join join;
+ int ret;
+
+ memset(&join, 0, sizeof(struct at76_req_join));
+ memcpy(join.essid, priv->essid, priv->essid_size);
+ join.essid_size = priv->essid_size;
+ memcpy(join.bssid, priv->bssid, ETH_ALEN);
+ join.bss_type = INFRASTRUCTURE_MODE;
+ join.channel = priv->channel;
+ join.timeout = cpu_to_le16(2000);
+
+ at76_dbg(DBG_MAC80211, "%s: sending CMD_JOIN", __func__);
+ ret = at76_set_card_command(priv->udev, CMD_JOIN, &join,
+ sizeof(struct at76_req_join));
+
+ if (ret < 0) {
+ printk(KERN_ERR "%s: at76_set_card_command failed: %d\n",
+ wiphy_name(priv->hw->wiphy), ret);
+ return 0;
+ }
+
+ ret = at76_wait_completion(priv, CMD_JOIN);
+ at76_dbg(DBG_MAC80211, "%s: CMD_JOIN returned: 0x%02x", __func__, ret);
+ if (ret != CMD_STATUS_COMPLETE) {
+ printk(KERN_ERR "%s: at76_wait_completion failed: %d\n",
+ wiphy_name(priv->hw->wiphy), ret);
+ return 0;
+ }
+
+ at76_set_pm_mode(priv);
+
+ return 0;
+}
+
+static void at76_work_join_bssid(struct work_struct *work)
+{
+ struct at76_priv *priv = container_of(work, struct at76_priv,
+ work_join_bssid);
+
+ if (priv->device_unplugged)
+ return;
+
+ mutex_lock(&priv->mtx);
+
+ if (is_valid_ether_addr(priv->bssid))
+ at76_join(priv);
+
+ mutex_unlock(&priv->mtx);
+}
+
static void at76_mac80211_tx_callback(struct urb *urb)
{
struct at76_priv *priv = urb->context;
@@ -1686,6 +1739,7 @@ static int at76_mac80211_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
struct at76_priv *priv = hw->priv;
struct at76_tx_buffer *tx_buffer = priv->bulk_out_buffer;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
int padding, submit_len, ret;
at76_dbg(DBG_MAC80211, "%s()", __func__);
@@ -1696,6 +1750,21 @@ static int at76_mac80211_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
return NETDEV_TX_BUSY;
}
+ /* The following code lines are important when the device is going to
+ * authenticate with a new bssid. The driver must send CMD_JOIN before
+ * an authentication frame is transmitted. For this to succeed, the
+ * correct bssid of the AP must be known. As mac80211 does not inform
+ * drivers about the bssid prior to the authentication process the
+ * following workaround is necessary. If the TX frame is an
+ * authentication frame extract the bssid and send the CMD_JOIN. */
+ if (mgmt->frame_control & cpu_to_le16(IEEE80211_STYPE_AUTH)) {
+ if (compare_ether_addr(priv->bssid, mgmt->bssid)) {
+ memcpy(priv->bssid, mgmt->bssid, ETH_ALEN);
+ ieee80211_queue_work(hw, &priv->work_join_bssid);
+ return NETDEV_TX_BUSY;
+ }
+ }
+
ieee80211_stop_queues(hw);
at76_ledtrig_tx_activity(); /* tell ledtrigger we send a packet */
@@ -1770,6 +1839,7 @@ static void at76_mac80211_stop(struct ieee80211_hw *hw)
at76_dbg(DBG_MAC80211, "%s()", __func__);
cancel_delayed_work(&priv->dwork_hw_scan);
+ cancel_work_sync(&priv->work_join_bssid);
cancel_work_sync(&priv->work_set_promisc);
mutex_lock(&priv->mtx);
@@ -1818,42 +1888,6 @@ static void at76_remove_interface(struct ieee80211_hw *hw,
at76_dbg(DBG_MAC80211, "%s()", __func__);
}
-static int at76_join(struct at76_priv *priv)
-{
- struct at76_req_join join;
- int ret;
-
- memset(&join, 0, sizeof(struct at76_req_join));
- memcpy(join.essid, priv->essid, priv->essid_size);
- join.essid_size = priv->essid_size;
- memcpy(join.bssid, priv->bssid, ETH_ALEN);
- join.bss_type = INFRASTRUCTURE_MODE;
- join.channel = priv->channel;
- join.timeout = cpu_to_le16(2000);
-
- at76_dbg(DBG_MAC80211, "%s: sending CMD_JOIN", __func__);
- ret = at76_set_card_command(priv->udev, CMD_JOIN, &join,
- sizeof(struct at76_req_join));
-
- if (ret < 0) {
- printk(KERN_ERR "%s: at76_set_card_command failed: %d\n",
- wiphy_name(priv->hw->wiphy), ret);
- return 0;
- }
-
- ret = at76_wait_completion(priv, CMD_JOIN);
- at76_dbg(DBG_MAC80211, "%s: CMD_JOIN returned: 0x%02x", __func__, ret);
- if (ret != CMD_STATUS_COMPLETE) {
- printk(KERN_ERR "%s: at76_wait_completion failed: %d\n",
- wiphy_name(priv->hw->wiphy), ret);
- return 0;
- }
-
- at76_set_pm_mode(priv);
-
- return 0;
-}
-
static void at76_dwork_hw_scan(struct work_struct *work)
{
struct at76_priv *priv = container_of(work, struct at76_priv,
@@ -2107,6 +2141,7 @@ static struct at76_priv *at76_alloc_new_device(struct usb_device *udev)
mutex_init(&priv->mtx);
INIT_WORK(&priv->work_set_promisc, at76_work_set_promisc);
INIT_WORK(&priv->work_submit_rx, at76_work_submit_rx);
+ INIT_WORK(&priv->work_join_bssid, at76_work_join_bssid);
INIT_DELAYED_WORK(&priv->dwork_hw_scan, at76_dwork_hw_scan);
tasklet_init(&priv->rx_tasklet, at76_rx_tasklet, 0);
@@ -2508,5 +2543,6 @@ MODULE_AUTHOR("Balint Seeber <n0_5p4m_p13453@hotmail.com>");
MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
MODULE_AUTHOR("Guido Guenther <agx@sigxcpu.org>");
MODULE_AUTHOR("Kalle Valo <kalle.valo@iki.fi>");
+MODULE_AUTHOR("Sebastian Smolorz <sesmo@gmx.net>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");