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iwlwifi: Check BSS ctx active before call mac80211

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commit e19ebcab01 upstream.

It is possible that the BSS context is not active (for example
when the current mode is set to GO), or that the vif->type is
different than station. In such a case we cannot
call mac80211 to report the average rssi for the interface
(the function assumes that the vif is valid and that the type
is station).

Reported-by: Daniel J Blueman <daniel@quora.org>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ilan Peer
2012-05-10 15:53:14 +03:00
committed by Greg Kroah-Hartman
parent bd9f6140e6
commit b7ad4aebc7
1 changed files with 5 additions and 0 deletions
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5
drivers/net/wireless/iwlwifi/iwl-agn-lib.c
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@@ -617,6 +617,11 @@ static bool iwlagn_fill_txpower_mode(struct iwl_priv *priv,
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
int ave_rssi;
if (!ctx->vif || (ctx->vif->type != NL80211_IFTYPE_STATION)) {
IWL_DEBUG_INFO(priv, "BSS ctx not active or not in sta mode\n");
return false;
}
ave_rssi = ieee80211_ave_rssi(ctx->vif);
if (!ave_rssi) {
/* no rssi data, no changes to reduce tx power */