[package] mac80211: add more ath9k patches

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16967 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 109 insertions, 0 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
new file mode 100644
index 000000000..8aabe87f9
--- /dev/null
+++ b/package/mac80211/patches/409-ath9k-fix-race-with-IEEE80211_CONF_PS-checks.patch
@@ -0,0 +1,109 @@
+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)) {