diff options
Diffstat (limited to 'package/mac80211/patches/409-ath9k-fix-race-with-IEEE80211_CONF_PS-checks.patch')
| -rw-r--r-- | package/mac80211/patches/409-ath9k-fix-race-with-IEEE80211_CONF_PS-checks.patch | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/package/mac80211/patches/409-ath9k-fix-race-with-IEEE80211_CONF_PS-checks.patch b/package/mac80211/patches/409-ath9k-fix-race-with-IEEE80211_CONF_PS-checks.patch deleted file mode 100644 index 8aabe87f95..0000000000 --- a/package/mac80211/patches/409-ath9k-fix-race-with-IEEE80211_CONF_PS-checks.patch +++ /dev/null @@ -1,109 +0,0 @@ -From c96f9c17f71213a562ce20d85a7418d5549235cc Mon Sep 17 00:00:00 2001 -From: Gabor Juhos <juhosg@openwrt.org> -Date: Fri, 24 Jul 2009 16:34:37 +0200 -Subject: [PATCH 1/2] ath9k: fix race with IEEE80211_CONF_PS checks - -There is a small window where the mac80211 changes the IEEE80211_CONF_PS -flag, and then informs the driver about the change. We have a race -condition if we are checking the flag in the same time. Avoid it by -introducing a local variable, and using that instead of checking the -IEEE80211_CONF_PS flag directly. - -This fix the problem reported by Luis: -http://article.gmane.org/gmane.linux.kernel.wireless.general/34363 - -Changes-licensed-under: ISC -Signed-off-by: Gabor Juhos <juhosg@openwrt.org> ---- - drivers/net/wireless/ath/ath9k/ath9k.h | 1 + - drivers/net/wireless/ath/ath9k/hw.c | 17 +++++++---------- - drivers/net/wireless/ath/ath9k/hw.h | 1 - - drivers/net/wireless/ath/ath9k/main.c | 8 ++++---- - 4 files changed, 12 insertions(+), 15 deletions(-) - ---- a/drivers/net/wireless/ath/ath9k/ath9k.h -+++ b/drivers/net/wireless/ath/ath9k/ath9k.h -@@ -561,6 +561,7 @@ struct ath_softc { - u32 keymax; - DECLARE_BITMAP(keymap, ATH_KEYMAX); - u8 splitmic; -+ bool ps_enabled; - unsigned long ps_usecount; - enum ath9k_int imask; - enum ath9k_ht_extprotspacing ht_extprotspacing; ---- a/drivers/net/wireless/ath/ath9k/hw.c -+++ b/drivers/net/wireless/ath/ath9k/hw.c -@@ -2793,10 +2793,8 @@ void ath9k_ps_wakeup(struct ath_softc *s - if (++sc->ps_usecount != 1) - goto unlock; - -- if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE) { -- sc->sc_ah->restore_mode = sc->sc_ah->power_mode; -+ if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE) - ath9k_hw_setpower_nolock(sc->sc_ah, ATH9K_PM_AWAKE); -- } - - unlock: - spin_unlock_irqrestore(&sc->sc_pm_lock, flags); -@@ -2810,13 +2808,12 @@ void ath9k_ps_restore(struct ath_softc * - if (--sc->ps_usecount != 0) - goto unlock; - -- if ((sc->hw->conf.flags & IEEE80211_CONF_PS) && -- !(sc->sc_flags & (SC_OP_WAIT_FOR_BEACON | -- SC_OP_WAIT_FOR_CAB | -- SC_OP_WAIT_FOR_PSPOLL_DATA | -- SC_OP_WAIT_FOR_TX_ACK))) -- ath9k_hw_setpower_nolock(sc->sc_ah, -- sc->sc_ah->restore_mode); -+ if (sc->ps_enabled && -+ !(sc->sc_flags & (SC_OP_WAIT_FOR_BEACON | -+ SC_OP_WAIT_FOR_CAB | -+ SC_OP_WAIT_FOR_PSPOLL_DATA | -+ SC_OP_WAIT_FOR_TX_ACK))) -+ ath9k_hw_setpower_nolock(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP); - - unlock: - spin_unlock_irqrestore(&sc->sc_pm_lock, flags); ---- a/drivers/net/wireless/ath/ath9k/hw.h -+++ b/drivers/net/wireless/ath/ath9k/hw.h -@@ -418,7 +418,6 @@ struct ath_hw { - - enum nl80211_iftype opmode; - enum ath9k_power_mode power_mode; -- enum ath9k_power_mode restore_mode; - - struct ath9k_nfcal_hist nfCalHist[NUM_NF_READINGS]; - struct ar5416Stats stats; ---- a/drivers/net/wireless/ath/ath9k/main.c -+++ b/drivers/net/wireless/ath/ath9k/main.c -@@ -496,8 +496,7 @@ static void ath9k_tasklet(unsigned long - if (status & ATH9K_INT_TX) - ath_tx_tasklet(sc); - -- if ((status & ATH9K_INT_TSFOOR) && -- (sc->hw->conf.flags & IEEE80211_CONF_PS)) { -+ if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) { - /* - * TSF sync does not look correct; remain awake to sync with - * the next Beacon. -@@ -2001,7 +2000,7 @@ static int ath9k_tx(struct ieee80211_hw - goto exit; - } - -- if (sc->hw->conf.flags & IEEE80211_CONF_PS) { -+ if (sc->ps_enabled) { - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; - /* - * mac80211 does not set PM field for normal data frames, so we -@@ -2270,8 +2269,9 @@ static int ath9k_config(struct ieee80211 - } - ath9k_hw_setrxabort(sc->sc_ah, 1); - } -- ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP); -+ sc->ps_enabled = true; - } else { -+ sc->ps_enabled = false; - ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE); - if (!(ah->caps.hw_caps & - ATH9K_HW_CAP_AUTOSLEEP)) { |