From 249943a2215c4d03c5dacf549b4ef9bf8439f17b Mon Sep 17 00:00:00 2001 From: Sujith Manoharan Date: Fri, 30 Jan 2015 19:05:27 +0530 Subject: [PATCH] ath9k: Check WOW triggers properly This patch makes sure that valid WOW triggers are present before trying to suspend the device. Also, introduce and use ATH_OP_WOW_ENABLED to bypass PCI suspend and clear it in resume(). Signed-off-by: Sujith Manoharan Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath.h | 1 + drivers/net/wireless/ath/ath9k/pci.c | 5 ++- drivers/net/wireless/ath/ath9k/wow.c | 53 +++++++++++++--------------- 3 files changed, 29 insertions(+), 30 deletions(-) diff --git a/drivers/net/wireless/ath/ath.h b/drivers/net/wireless/ath/ath.h index ccba4fea7269..1eebe2ea3dfb 100644 --- a/drivers/net/wireless/ath/ath.h +++ b/drivers/net/wireless/ath/ath.h @@ -64,6 +64,7 @@ enum ath_op_flags { ATH_OP_HW_RESET, ATH_OP_SCANNING, ATH_OP_MULTI_CHANNEL, + ATH_OP_WOW_ENABLED, }; enum ath_bus_type { diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c index cc5c6810f32e..e6fef1be9977 100644 --- a/drivers/net/wireless/ath/ath9k/pci.c +++ b/drivers/net/wireless/ath/ath9k/pci.c @@ -998,9 +998,12 @@ static int ath_pci_suspend(struct device *device) struct pci_dev *pdev = to_pci_dev(device); struct ieee80211_hw *hw = pci_get_drvdata(pdev); struct ath_softc *sc = hw->priv; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); - if (sc->wow_enabled) + if (test_bit(ATH_OP_WOW_ENABLED, &common->op_flags)) { + dev_info(&pdev->dev, "WOW is enabled, bypassing PCI suspend\n"); return 0; + } /* The device has to be moved to FULLSLEEP forcibly. * Otherwise the chip never moved to full sleep, diff --git a/drivers/net/wireless/ath/ath9k/wow.c b/drivers/net/wireless/ath/ath9k/wow.c index 8bcbaa91529e..c0c564de982e 100644 --- a/drivers/net/wireless/ath/ath9k/wow.c +++ b/drivers/net/wireless/ath/ath9k/wow.c @@ -23,21 +23,21 @@ static const struct wiphy_wowlan_support ath9k_wowlan_support = { .pattern_max_len = MAX_PATTERN_SIZE, }; -static void ath9k_wow_map_triggers(struct ath_softc *sc, - struct cfg80211_wowlan *wowlan, - u32 *wow_triggers) +static u8 ath9k_wow_map_triggers(struct ath_softc *sc, + struct cfg80211_wowlan *wowlan) { + u8 wow_triggers = 0; + if (wowlan->disconnect) - *wow_triggers |= AH_WOW_LINK_CHANGE | - AH_WOW_BEACON_MISS; + wow_triggers |= AH_WOW_LINK_CHANGE | + AH_WOW_BEACON_MISS; if (wowlan->magic_pkt) - *wow_triggers |= AH_WOW_MAGIC_PATTERN_EN; + wow_triggers |= AH_WOW_MAGIC_PATTERN_EN; if (wowlan->n_patterns) - *wow_triggers |= AH_WOW_USER_PATTERN_EN; - - sc->wow_enabled = *wow_triggers; + wow_triggers |= AH_WOW_USER_PATTERN_EN; + return wow_triggers; } static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc) @@ -45,7 +45,7 @@ static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc) struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); int pattern_count = 0; - int i, byte_cnt; + int i, byte_cnt = 0; u8 dis_deauth_pattern[MAX_PATTERN_SIZE]; u8 dis_deauth_mask[MAX_PATTERN_SIZE]; @@ -80,12 +80,7 @@ static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc) * | x:x:x:x:x:x -- 22 bytes */ - /* Create Disassociate Pattern first */ - - byte_cnt = 0; - /* Fill out the mask with all FF's */ - for (i = 0; i < MAX_PATTERN_MASK_SIZE; i++) dis_deauth_mask[i] = 0xff; @@ -108,17 +103,13 @@ static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc) byte_cnt += 6; /* copy the bssid, its same as the source mac address */ - memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN); /* Create Disassociate pattern mask */ - dis_deauth_mask[0] = 0xfe; dis_deauth_mask[1] = 0x03; dis_deauth_mask[2] = 0xc0; - ath_dbg(common, WOW, "Adding disassoc/deauth patterns for WoW\n"); - ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask, pattern_count, byte_cnt); @@ -131,7 +122,6 @@ static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc) ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask, pattern_count, byte_cnt); - } static void ath9k_wow_add_pattern(struct ath_softc *sc, @@ -190,7 +180,7 @@ int ath9k_suspend(struct ieee80211_hw *hw, struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); - u32 wow_triggers_enabled = 0; + u8 triggers; int ret = 0; ath9k_deinit_channel_context(sc); @@ -230,14 +220,16 @@ int ath9k_suspend(struct ieee80211_hw *hw, goto fail_wow; } + triggers = ath9k_wow_map_triggers(sc, wowlan); + if (!triggers) { + ath_dbg(common, WOW, "No valid WoW triggers\n"); + ret = 1; + goto fail_wow; + } + ath_cancel_work(sc); ath_stop_ani(sc); - ath9k_wow_map_triggers(sc, wowlan, &wow_triggers_enabled); - - ath_dbg(common, WOW, "WoW triggers enabled 0x%x\n", - wow_triggers_enabled); - ath9k_ps_wakeup(sc); ath9k_stop_btcoex(sc); @@ -248,7 +240,7 @@ int ath9k_suspend(struct ieee80211_hw *hw, */ ath9k_wow_add_disassoc_deauth_pattern(sc); - if (wow_triggers_enabled & AH_WOW_USER_PATTERN_EN) + if (triggers & AH_WOW_USER_PATTERN_EN) ath9k_wow_add_pattern(sc, wowlan); spin_lock_bh(&sc->sc_pcu_lock); @@ -273,12 +265,13 @@ int ath9k_suspend(struct ieee80211_hw *hw, synchronize_irq(sc->irq); tasklet_kill(&sc->intr_tq); - ath9k_hw_wow_enable(ah, wow_triggers_enabled); + ath9k_hw_wow_enable(ah, triggers); ath9k_ps_restore(sc); - ath_dbg(common, ANY, "WoW enabled in ath9k\n"); + ath_dbg(common, WOW, "Suspend with WoW triggers: 0x%x\n", triggers); atomic_inc(&sc->wow_sleep_proc_intr); + set_bit(ATH_OP_WOW_ENABLED, &common->op_flags); fail_wow: mutex_unlock(&sc->mutex); return ret; @@ -327,6 +320,8 @@ int ath9k_resume(struct ieee80211_hw *hw) ath_restart_work(sc); ath9k_start_btcoex(sc); + clear_bit(ATH_OP_WOW_ENABLED, &common->op_flags); + ath9k_ps_restore(sc); mutex_unlock(&sc->mutex); -- 2.30.2