Return-path: Received: from mail-la0-f46.google.com ([209.85.215.46]:33037 "EHLO mail-la0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752120AbbFWIyv (ORCPT ); Tue, 23 Jun 2015 04:54:51 -0400 Received: by laka10 with SMTP id a10so2233941lak.0 for ; Tue, 23 Jun 2015 01:54:49 -0700 (PDT) From: Janusz Dziedzic To: linux-wireless@vger.kernel.org Cc: ath9k-devel@venema.h4ckr.net, nbd@openwrt.org, sujith@msujith.org, chaitanya.mgit@gmail.com, Janusz Dziedzic Subject: [PATCH 1/3 v2] ath9k: handle RoC cancel correctly Date: Tue, 23 Jun 2015 10:54:22 +0200 Message-Id: <1435049662-20477-1-git-send-email-janusz.dziedzic@tieto.com> (sfid-20150623_105456_774306_2C93A0EF) Sender: linux-wireless-owner@vger.kernel.org List-ID: In case we will get ROC cancel from mac80211 we should not call ieee80211_remain_on_channel_expired(). In other case I hit such warning on MIPS and p2p negotiation failed (tested with use_chanctx=1). ath: phy0: Starting RoC period ath: phy0: Channel definition created: 2412 MHz ath: phy0: Assigned next_chan to 2412 MHz ath: phy0: Offchannel duration for chan 2412 MHz : 506632 ath: phy0: ath_chanctx_set_next: current: 2412 MHz, next: 2412 MHz ath: phy0: Stopping current chanctx: 2412 ath: phy0: Flush timeout: 200 ath: phy0: ath_chanctx_set_next: Set channel 2412 MHz ath: phy0: Set channel: 2412 MHz width: 0 ath: phy0: Reset to 2412 MHz, HT40: 0 fastcc: 0 ath: phy0: cur_chan: 2412 MHz, event: ATH_CHANCTX_EVENT_TSF_TIMER, state: ATH_CHANCTX_STATE_IDLE ath: phy0: ath_offchannel_channel_change: offchannel state: ATH_OFFCHANNEL_ROC_START ath: phy0: cur_chan: 2412 MHz, event: ATH_CHANCTX_EVENT_SWITCH, state: ATH_CHANCTX_STATE_IDLE ath: phy0: Cancel RoC ath: phy0: RoC aborted ath: phy0: RoC request on vif: 00:03:7f:4e:a0:cd, type: 1 duration: 500 ath: phy0: Starting RoC period ath: phy0: Channel definition created: 2412 MHz ath: phy0: Assigned next_chan to 2412 MHz ath: phy0: Offchannel duration for chan 2412 MHz : 506705 ath: phy0: ath_chanctx_set_next: current: 2412 MHz, next: 2412 MHz ath: phy0: ath_offchannel_channel_change: offchannel state: ATH_OFFCHANNEL_ROC_START ath: phy0: cur_chan: 2412 MHz, event: ATH_CHANCTX_EVENT_SWITCH, state: ATH_CHANCTX_STATE_IDLE ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3312 at drivers/net/wireless/ath/ath9k/main.c:2319 Modules linked in: ath9k ath9k_common ath9k_hw ath mac80211 cfg80211 Signed-off-by: Janusz Dziedzic --- drivers/net/wireless/ath/ath9k/ath9k.h | 8 +++++++- drivers/net/wireless/ath/ath9k/channel.c | 23 ++++++++++++++++------- drivers/net/wireless/ath/ath9k/main.c | 4 ++-- 3 files changed, 25 insertions(+), 10 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 030fd0f..7d41c8f 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -409,6 +409,12 @@ enum ath_offchannel_state { ATH_OFFCHANNEL_ROC_DONE, }; +enum ath_roc_complete_reason { + ATH_ROC_COMPLETE_EXPIRE, + ATH_ROC_COMPLETE_ABORT, + ATH_ROC_COMPLETE_CANCEL, +}; + struct ath_offchannel { struct ath_chanctx chan; struct timer_list timer; @@ -470,7 +476,7 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, void ath_chanctx_set_next(struct ath_softc *sc, bool force); void ath_offchannel_next(struct ath_softc *sc); void ath_scan_complete(struct ath_softc *sc, bool abort); -void ath_roc_complete(struct ath_softc *sc, bool abort); +void ath_roc_complete(struct ath_softc *sc, enum ath_roc_complete_reason reason); struct ath_chanctx* ath_is_go_chanctx_present(struct ath_softc *sc); #else diff --git a/drivers/net/wireless/ath/ath9k/channel.c b/drivers/net/wireless/ath/ath9k/channel.c index 2066650..35cfcd0 100644 --- a/drivers/net/wireless/ath/ath9k/channel.c +++ b/drivers/net/wireless/ath/ath9k/channel.c @@ -915,18 +915,27 @@ void ath_offchannel_next(struct ath_softc *sc) } } -void ath_roc_complete(struct ath_softc *sc, bool abort) +void ath_roc_complete(struct ath_softc *sc, enum ath_roc_complete_reason reason) { struct ath_common *common = ath9k_hw_common(sc->sc_ah); - if (abort) + sc->offchannel.roc_vif = NULL; + sc->offchannel.roc_chan = NULL; + + switch(reason) { + case ATH_ROC_COMPLETE_ABORT: ath_dbg(common, CHAN_CTX, "RoC aborted\n"); - else + ieee80211_remain_on_channel_expired(sc->hw); + break; + case ATH_ROC_COMPLETE_EXPIRE: ath_dbg(common, CHAN_CTX, "RoC expired\n"); + ieee80211_remain_on_channel_expired(sc->hw); + break; + case ATH_ROC_COMPLETE_CANCEL: + ath_dbg(common, CHAN_CTX, "RoC canceled\n"); + break; + } - sc->offchannel.roc_vif = NULL; - sc->offchannel.roc_chan = NULL; - ieee80211_remain_on_channel_expired(sc->hw); ath_offchannel_next(sc); ath9k_ps_restore(sc); } @@ -1058,7 +1067,7 @@ static void ath_offchannel_timer(unsigned long data) case ATH_OFFCHANNEL_ROC_START: case ATH_OFFCHANNEL_ROC_WAIT: sc->offchannel.state = ATH_OFFCHANNEL_ROC_DONE; - ath_roc_complete(sc, false); + ath_roc_complete(sc, ATH_ROC_COMPLETE_EXPIRE); break; default: break; diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 945f002..2277e09 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -2244,7 +2244,7 @@ static void ath9k_cancel_pending_offchannel(struct ath_softc *sc) del_timer_sync(&sc->offchannel.timer); if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START) - ath_roc_complete(sc, true); + ath_roc_complete(sc, ATH_ROC_COMPLETE_ABORT); } if (test_bit(ATH_OP_SCANNING, &common->op_flags)) { @@ -2353,7 +2353,7 @@ static int ath9k_cancel_remain_on_channel(struct ieee80211_hw *hw) if (sc->offchannel.roc_vif) { if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START) - ath_roc_complete(sc, true); + ath_roc_complete(sc, ATH_ROC_COMPLETE_CANCEL); } mutex_unlock(&sc->mutex); -- 1.9.1