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iwlwifi: introduce iwl_sta_id_or_broadcast 

There are now five places where we need to
look up the station ID, but the sta pointer
may be NULL due to mac80211 passing that to
indicate a certain special state.

Replace all these by a new inline function,
called iwl_sta_id_or_broadcast(), and add
documentation about when to use it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
This commit is contained in:
Johannes Berg 2010-04-30 14:08:00 -07:00 committed by Reinette Chatre
parent fd76f148eb
commit 0af8bcae6f
5 changed files with 41 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/net/wireless/iwlwifi/iwl-agn-tx.c
View File

@ -567,10 +567,7 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
hdr_len = ieee80211_hdrlen(fc);
/* Find index into station table for destination station */
if (!info->control.sta)
sta_id = priv->hw_params.bcast_sta_id;
else
sta_id = iwl_sta_id(info->control.sta);
sta_id = iwl_sta_id_or_broadcast(priv, info->control.sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
hdr->addr1);

14
drivers/net/wireless/iwlwifi/iwl-agn.c
View File

@ -3081,17 +3081,9 @@ static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
return -EOPNOTSUPP;
}
if (sta) {
sta_id = iwl_sta_id(sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
sta->addr);
return -EINVAL;
}
} else {
sta_id = priv->hw_params.bcast_sta_id;
}
sta_id = iwl_sta_id_or_broadcast(priv, sta);
if (sta_id == IWL_INVALID_STATION)
return -EINVAL;
mutex_lock(&priv->mutex);
iwl_scan_cancel_timeout(priv, 100);

16
drivers/net/wireless/iwlwifi/iwl-sta.c
View File

@ -972,24 +972,16 @@ void iwl_update_tkip_key(struct iwl_priv *priv,
unsigned long flags;
int i;
if (sta) {
sta_id = iwl_sta_id(sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_MAC80211(priv, "leave - %pM not initialised.\n",
sta->addr);
return;
}
} else
sta_id = priv->hw_params.bcast_sta_id;
if (iwl_scan_cancel(priv)) {
/* cancel scan failed, just live w/ bad key and rely
briefly on SW decryption */
return;
}
sta_id = iwl_sta_id_or_broadcast(priv, sta);
if (sta_id == IWL_INVALID_STATION)
return;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;

29
drivers/net/wireless/iwlwifi/iwl-sta.h
View File

@ -107,4 +107,33 @@ static inline int iwl_sta_id(struct ieee80211_sta *sta)
return ((struct iwl_station_priv_common *)sta->drv_priv)->sta_id;
}
/**
* iwl_sta_id_or_broadcast - return sta_id or broadcast sta
* @priv: iwl priv
* @sta: mac80211 station
*
* In certain circumstances mac80211 passes a station pointer
* that may be %NULL, for example during TX or key setup. In
* that case, we need to use the broadcast station, so this
* inline wraps that pattern.
*/
static inline int iwl_sta_id_or_broadcast(struct iwl_priv *priv,
struct ieee80211_sta *sta)
{
int sta_id;
if (!sta)
return priv->hw_params.bcast_sta_id;
sta_id = iwl_sta_id(sta);
/*
* mac80211 should not be passing a partially
* initialised station!
*/
WARN_ON(sta_id == IWL_INVALID_STATION);
return sta_id;
}
#endif /* __iwl_sta_h__ */

19
drivers/net/wireless/iwlwifi/iwl3945-base.c
View File

@ -509,10 +509,7 @@ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
hdr_len = ieee80211_hdrlen(fc);
/* Find index into station table for destination station */
if (!info->control.sta)
sta_id = priv->hw_params.bcast_sta_id;
else
sta_id = iwl_sta_id(info->control.sta);
sta_id = iwl_sta_id_or_broadcast(priv, info->control.sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
hdr->addr1);
@ -3336,17 +3333,9 @@ static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
static_key = !iwl_is_associated(priv);
if (!static_key) {
if (!sta) {
sta_id = priv->hw_params.bcast_sta_id;
} else {
sta_id = iwl_sta_id(sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_MAC80211(priv,
"leave - %pM not in station map.\n",
sta->addr);
return -EINVAL;
}
}
sta_id = iwl_sta_id_or_broadcast(priv, sta);
if (sta_id == IWL_INVALID_STATION)
return -EINVAL;
}
mutex_lock(&priv->mutex);