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ath9k: Cache BSS information 

Using the BSS information stored in mac80211 directly
is racy in certain conditions. For example, in a MCC
setup, if the scheduler is switching channels when
a local deauth is issued, calculation of the opmode/bssid
etc. is incorrect. To avoid this, store the bss params
in the driver and use it.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan 2014-09-17 14:45:56 +05:30 committed by John W. Linville
parent 093ec3c533
commit cb35582ab4
3 changed files with 17 additions and 7 deletions
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5
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -585,6 +585,11 @@ void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
struct ath_vif {
struct list_head list;
/* BSS info */
u8 bssid[ETH_ALEN];
u16 aid;
bool assoc;
struct ieee80211_vif *vif;
struct ath_node mcast_node;
int av_bslot;

6
drivers/net/wireless/ath/ath9k/channel.c
View File

@ -211,7 +211,7 @@ void ath_chanctx_check_active(struct ath_softc *sc, struct ath_chanctx *ctx)
switch (vif->type) {
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_STATION:
if (vif->bss_conf.assoc)
if (avp->assoc)
active = true;
break;
default:
@ -917,7 +917,7 @@ ath_chanctx_send_vif_ps_frame(struct ath_softc *sc, struct ath_vif *avp,
switch (vif->type) {
case NL80211_IFTYPE_STATION:
if (!vif->bss_conf.assoc)
if (!avp->assoc)
return false;
skb = ieee80211_nullfunc_get(sc->hw, vif);
@ -1339,7 +1339,7 @@ void ath9k_p2p_ps_timer(void *priv)
rcu_read_lock();
vif = avp->vif;
sta = ieee80211_find_sta(vif, vif->bss_conf.bssid);
sta = ieee80211_find_sta(vif, avp->bssid);
if (!sta)
goto out;

13
drivers/net/wireless/ath/ath9k/main.c
View File

@ -898,6 +898,7 @@ static bool ath9k_uses_beacons(int type)
static void ath9k_vif_iter(struct ath9k_vif_iter_data *iter_data,
u8 *mac, struct ieee80211_vif *vif)
{
struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
int i;
if (iter_data->has_hw_macaddr) {
@ -918,7 +919,7 @@ static void ath9k_vif_iter(struct ath9k_vif_iter_data *iter_data,
break;
case NL80211_IFTYPE_STATION:
iter_data->nstations++;
if (vif->bss_conf.assoc && !iter_data->primary_sta)
if (avp->assoc && !iter_data->primary_sta)
iter_data->primary_sta = vif;
break;
case NL80211_IFTYPE_ADHOC:
@ -963,13 +964,13 @@ static void ath9k_set_assoc_state(struct ath_softc *sc,
struct ieee80211_vif *vif, bool changed)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
unsigned long flags;
set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
ether_addr_copy(common->curbssid, bss_conf->bssid);
common->curaid = bss_conf->aid;
ether_addr_copy(common->curbssid, avp->bssid);
common->curaid = avp->aid;
ath9k_hw_write_associd(sc->sc_ah);
if (changed) {
@ -1698,6 +1699,10 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
bss_conf->bssid, bss_conf->assoc);
ether_addr_copy(avp->bssid, bss_conf->bssid);
avp->aid = bss_conf->aid;
avp->assoc = bss_conf->assoc;
ath9k_calculate_summary_state(sc, avp->chanctx);
if (ath9k_is_chanctx_enabled()) {