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Libertas: fix WARN_ON issues in cfg80211 support 

In following scenarios WARN_ON() in cfg80211 code was triggered.
a) Driver unload or card removal.
b) Disconnect from infra network
c) Adhoc start/join
d) Adhoc stop
Added following fixes to avoid WARN_ON() in cfg80211 code.
a) Ensured that cfg80211_disconnected() function defined in cfg80211
code will be called only in infra mode.
b) Solved timing issue by moving cfg80211_disconnected() call inside
lbs_cfg_disconnect().
c) Updated "wdev->ssid" in driver code after Adhoc join/start
d) Removed unnecessory cfg80211_disconnected() call in lbs_remove_card.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kiran Divekar <dkiran@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Kiran Divekar 2010-06-04 23:20:37 -07:00 committed by John W. Linville
parent e86dc1ca46
commit e4fe4eafa4
3 changed files with 15 additions and 28 deletions
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37
drivers/net/wireless/libertas/cfg.c
View File

@ -1238,28 +1238,6 @@ static int lbs_cfg_connect(struct wiphy *wiphy, struct net_device *dev,
return ret;
}
/* callback from lbs_cfg_disconnect() */
static int lbs_cfg_ret_disconnect(struct lbs_private *priv, unsigned long dummy,
struct cmd_header *resp)
{
lbs_deb_enter(LBS_DEB_CFG80211);
cfg80211_disconnected(priv->dev,
priv->disassoc_reason,
NULL, 0, /* TODO? */
GFP_KERNEL);
/* TODO: get rid of priv->connect_status */
priv->connect_status = LBS_CONNECTED;
lbs_deb_leave(LBS_DEB_CFG80211);
return 0;
}
static int lbs_cfg_disconnect(struct wiphy *wiphy, struct net_device *dev,
u16 reason_code)
{
@ -1277,9 +1255,14 @@ static int lbs_cfg_disconnect(struct wiphy *wiphy, struct net_device *dev,
memcpy(cmd.macaddr, &priv->assoc_bss, ETH_ALEN);
cmd.reasoncode = cpu_to_le16(reason_code);
__lbs_cmd_async(priv, CMD_802_11_DEAUTHENTICATE,
&cmd.hdr, sizeof(cmd),
lbs_cfg_ret_disconnect, 0);
if (lbs_cmd_with_response(priv, CMD_802_11_DEAUTHENTICATE, &cmd))
return -EFAULT;
cfg80211_disconnected(priv->dev,
priv->disassoc_reason,
NULL, 0,
GFP_KERNEL);
priv->connect_status = LBS_DISCONNECTED;
return 0;
}
@ -1673,6 +1656,10 @@ static void lbs_join_post(struct lbs_private *priv,
params->beacon_interval,
fake_ie, fake - fake_ie,
0, GFP_KERNEL);
memcpy(priv->wdev->ssid, params->ssid, params->ssid_len);
priv->wdev->ssid_len = params->ssid_len;
cfg80211_ibss_joined(priv->dev, bssid, GFP_KERNEL);
/* TODO: consider doing this at MACREG_INT_CODE_LINK_SENSED time */

4
drivers/net/wireless/libertas/cmdresp.c
View File

@ -31,7 +31,9 @@ void lbs_mac_event_disconnected(struct lbs_private *priv)
* It causes problem in the Supplicant
*/
msleep_interruptible(1000);
lbs_send_disconnect_notification(priv);
if (priv->wdev->iftype == NL80211_IFTYPE_STATION)
lbs_send_disconnect_notification(priv);
/* report disconnect to upper layer */
netif_stop_queue(priv->dev);

2
drivers/net/wireless/libertas/main.c
View File

@ -932,8 +932,6 @@ void lbs_remove_card(struct lbs_private *priv)
lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
}
lbs_send_disconnect_notification(priv);
if (priv->is_deep_sleep) {
priv->is_deep_sleep = 0;
wake_up_interruptible(&priv->ds_awake_q);