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ath9k: Cancel pending offchannel operations

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This patch makes sure that pending roc/scan
operations are cancelled properly when a new
context is assigned/unassigned.

The flush_work() call to flush out any scheduled
channel context work is removed, instead, sc->mutex
is dropped to allow any pending work to get a chance
to complete by the channel scheduler. Also, increase
the timeout to allow a switch to an active GO.

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 2014-11-16 06:11:07 +05:30 committed by John W. Linville
parent e21a1d8b2b
commit 6185672aba
1 changed files with 30 additions and 13 deletions
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43
drivers/net/wireless/ath/ath9k/main.c
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@ -2196,6 +2196,28 @@ static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
#ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
static void ath9k_cancel_pending_offchannel(struct ath_softc *sc)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
if (sc->offchannel.roc_vif) {
ath_dbg(common, CHAN_CTX,
"%s: Aborting RoC\n", __func__);
del_timer_sync(&sc->offchannel.timer);
if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START)
ath_roc_complete(sc, true);
}
if (test_bit(ATH_OP_SCANNING, &common->op_flags)) {
ath_dbg(common, CHAN_CTX,
"%s: Aborting HW scan\n", __func__);
del_timer_sync(&sc->offchannel.timer);
ath_scan_complete(sc, true);
}
}
static int ath9k_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_scan_request *hw_req)
{
@ -2382,6 +2404,8 @@ static int ath9k_assign_vif_chanctx(struct ieee80211_hw *hw,
struct ath_chanctx *ctx = ath_chanctx_get(conf);
int i;
ath9k_cancel_pending_offchannel(sc);
mutex_lock(&sc->mutex);
ath_dbg(common, CHAN_CTX,
@ -2411,6 +2435,8 @@ static void ath9k_unassign_vif_chanctx(struct ieee80211_hw *hw,
struct ath_chanctx *ctx = ath_chanctx_get(conf);
int ac;
ath9k_cancel_pending_offchannel(sc);
mutex_lock(&sc->mutex);
ath_dbg(common, CHAN_CTX,
@ -2456,18 +2482,7 @@ static void ath9k_mgd_prepare_tx(struct ieee80211_hw *hw,
if (!changed)
goto out;
if (test_bit(ATH_OP_SCANNING, &common->op_flags)) {
ath_dbg(common, CHAN_CTX,
"%s: Aborting HW scan\n", __func__);
mutex_unlock(&sc->mutex);
del_timer_sync(&sc->offchannel.timer);
ath_scan_complete(sc, true);
flush_work(&sc->chanctx_work);
mutex_lock(&sc->mutex);
}
ath9k_cancel_pending_offchannel(sc);
go_ctx = ath_is_go_chanctx_present(sc);
@ -2482,13 +2497,15 @@ static void ath9k_mgd_prepare_tx(struct ieee80211_hw *hw,
beacon_int = TU_TO_USEC(cur_conf->beacon_interval);
spin_unlock_bh(&sc->chan_lock);
timeout = usecs_to_jiffies(beacon_int);
timeout = usecs_to_jiffies(beacon_int * 2);
init_completion(&sc->go_beacon);
mutex_unlock(&sc->mutex);
if (wait_for_completion_timeout(&sc->go_beacon,
timeout) == 0)
ath_dbg(common, CHAN_CTX,
"Failed to send new NoA\n");
mutex_lock(&sc->mutex);
}
ath_dbg(common, CHAN_CTX,