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mac80211: fix ieee80211_find_sta[_by_hw]

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Both of these functions can currently return
a station pointer that, to the driver, is
invalid (in IBSS mode only) because adding
the station failed. Check for that, and also
make ieee80211_find_sta() properly use the
per interface station search.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2010-04-30 13:48:36 +02:00 committed by John W. Linville
parent c7ab1a4dcb
commit f7c65594f7
1 changed files with 13 additions and 4 deletions
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17
net/mac80211/sta_info.c
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@ -855,8 +855,12 @@ struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw,
struct sta_info *sta, *nxt;
/* Just return a random station ... first in list ... */
for_each_sta_info(hw_to_local(hw), addr, sta, nxt)
for_each_sta_info(hw_to_local(hw), addr, sta, nxt) {
if (!sta->uploaded)
return NULL;
return &sta->sta;
}
return NULL;
}
EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_hw);
@ -864,14 +868,19 @@ EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_hw);
struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
const u8 *addr)
{
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
if (!vif)
return NULL;
sdata = vif_to_sdata(vif);
sta = sta_info_get_bss(vif_to_sdata(vif), addr);
if (!sta)
return NULL;
return ieee80211_find_sta_by_hw(&sdata->local->hw, addr);
if (!sta->uploaded)
return NULL;
return &sta->sta;
}
EXPORT_SYMBOL(ieee80211_find_sta);