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mac80211: warn if unexpectedly removing stations

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When an interface is brought down it must have been
disconnected (or similar) in all modes other than WDS,
so warn if any stations were removed in other modes.

Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2012-12-13 23:26:57 +01:00
parent b998e8bb3e
commit 09f4114e02
1 changed files with 7 additions and 5 deletions
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12
net/mac80211/iface.c
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@ -747,7 +747,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
unsigned long flags;
struct sk_buff *skb, *tmp;
u32 hw_reconf_flags = 0;
int i;
int i, flushed;
clear_bit(SDATA_STATE_RUNNING, &sdata->state);
@ -772,11 +772,13 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
* (because if we remove a STA after ops->remove_interface()
* the driver will have removed the vif info already!)
*
* This is relevant only in AP, WDS and mesh modes, since in
* all other modes we've already removed all stations when
* disconnecting etc.
* This is relevant only in WDS mode, in all other modes we've
* already removed all stations when disconnecting or similar,
* so warn otherwise.
*/
sta_info_flush(sdata);
flushed = sta_info_flush(sdata);
WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
(sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
/*
* Don't count this interface for promisc/allmulti while it