From 80710bb7cc3894a8d41bed6dccb0d93459cc1417 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 25 Jul 2008 22:35:36 +0000
Subject: [PATCH] madwifi: fix queue stop/start during key updates

SVN-Revision: 11923
---
 .../madwifi/patches/300-napi_polling.patch    | 41 ++++++++++++-------
 1 file changed, 26 insertions(+), 15 deletions(-)

diff --git a/package/madwifi/patches/300-napi_polling.patch b/package/madwifi/patches/300-napi_polling.patch
index 6b472caacd..609e74cd21 100644
--- a/package/madwifi/patches/300-napi_polling.patch
+++ b/package/madwifi/patches/300-napi_polling.patch
@@ -107,7 +107,7 @@
  		netif_stop_queue(dev);	/* XXX re-enabled by ath_newstate */
  		dev->flags &= ~IFF_RUNNING;	/* NB: avoid recursion */
  		ieee80211_stop_running(ic);	/* stop all VAPs */
-@@ -4013,6 +4051,39 @@
+@@ -4013,12 +4051,47 @@
  	return ath_keyset(sc, k, mac, vap->iv_bss);
  }
  
@@ -147,7 +147,15 @@
  /*
   * Block/unblock tx+rx processing while a key change is done.
   * We assume the caller serializes key management operations
-@@ -4032,13 +4103,7 @@
+  * so we only need to worry about synchronization with other
+  * uses that originate in the driver.
+  */
++#define	IS_UP(_dev) \
++	(((_dev)->flags & (IFF_RUNNING|IFF_UP)) == (IFF_RUNNING|IFF_UP))
+ static void
+ ath_key_update_begin(struct ieee80211vap *vap)
+ {
+@@ -4032,14 +4105,9 @@
  	 * When called from the rx tasklet we cannot use
  	 * tasklet_disable because it will block waiting
  	 * for us to complete execution.
@@ -158,10 +166,13 @@
  	 */
 -	if (!in_softirq())
 -		tasklet_disable(&sc->sc_rxtq);
- 	netif_stop_queue(dev);
+-	netif_stop_queue(dev);
++	if (IS_UP(vap->iv_dev))
++		netif_stop_queue(dev);
  }
  
-@@ -4051,9 +4116,9 @@
+ static void
+@@ -4051,9 +4119,9 @@
  #endif
  
  	DPRINTF(sc, ATH_DEBUG_KEYCACHE, "End\n");
@@ -169,12 +180,12 @@
 -	if (!in_softirq())		/* NB: see above */
 -		tasklet_enable(&sc->sc_rxtq);
 +
-+	if (dev->flags&IFF_RUNNING)
++	if (IS_UP(vap->iv_dev))
 +		netif_wake_queue(dev);
  }
  
  /*
-@@ -6360,15 +6425,25 @@
+@@ -6360,15 +6428,25 @@
  	sc->sc_rxotherant = 0;
  }
  
@@ -204,7 +215,7 @@
  	struct ieee80211com *ic = &sc->sc_ic;
  	struct ath_hal *ah = sc ? sc->sc_ah : NULL;
  	struct ath_desc *ds;
-@@ -6378,8 +6453,10 @@
+@@ -6378,8 +6456,10 @@
  	unsigned int len;
  	int type;
  	u_int phyerr;
@@ -215,7 +226,7 @@
  	do {
  		bf = STAILQ_FIRST(&sc->sc_rxbuf);
  		if (bf == NULL) {		/* XXX ??? can this happen */
-@@ -6403,6 +6480,15 @@
+@@ -6403,6 +6483,15 @@
  			/* NB: never process the self-linked entry at the end */
  			break;
  		}
@@ -231,7 +242,7 @@
  		skb = bf->bf_skb;
  		if (skb == NULL) {
  			EPRINTF(sc, "Dropping; buffer contains NULL skbuff.\n");
-@@ -6450,6 +6536,7 @@
+@@ -6450,6 +6539,7 @@
  				sc->sc_stats.ast_rx_phyerr++;
  				phyerr = rs->rs_phyerr & 0x1f;
  				sc->sc_stats.ast_rx_phy[phyerr]++;
@@ -239,7 +250,7 @@
  			}
  			if (rs->rs_status & HAL_RXERR_DECRYPT) {
  				/*
-@@ -6645,9 +6732,43 @@
+@@ -6645,9 +6735,43 @@
  		STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list);
  		ATH_RXBUF_UNLOCK_IRQ(sc);
  	} while (ath_rxbuf_init(sc, bf) == 0);
@@ -283,7 +294,7 @@
  #undef PA2DESC
  }
  
-@@ -8298,12 +8419,24 @@
+@@ -8298,12 +8422,24 @@
  {
  	struct net_device *dev = (struct net_device *)data;
  	struct ath_softc *sc = dev->priv;
@@ -308,7 +319,7 @@
  	netif_wake_queue(dev);
  
  	if (sc->sc_softled)
-@@ -8319,7 +8452,9 @@
+@@ -8319,7 +8455,9 @@
  {
  	struct net_device *dev = (struct net_device *)data;
  	struct ath_softc *sc = dev->priv;
@@ -318,7 +329,7 @@
  	/*
  	 * Process each active queue.
  	 */
-@@ -8340,6 +8475,16 @@
+@@ -8340,6 +8478,16 @@
  	if (sc->sc_uapsdq && txqactive(sc->sc_ah, sc->sc_uapsdq->axq_qnum))
  		ath_tx_processq(sc, sc->sc_uapsdq);
  
@@ -335,7 +346,7 @@
  	netif_wake_queue(dev);
  
  	if (sc->sc_softled)
-@@ -8355,13 +8500,25 @@
+@@ -8355,13 +8503,25 @@
  	struct net_device *dev = (struct net_device *)data;
  	struct ath_softc *sc = dev->priv;
  	unsigned int i;
@@ -361,7 +372,7 @@
  	netif_wake_queue(dev);
  
  	if (sc->sc_softled)
-@@ -10296,9 +10453,9 @@
+@@ -10296,9 +10456,9 @@
  	dev->mtu = mtu;
  	if ((dev->flags & IFF_RUNNING) && !sc->sc_invalid) {
  		/* NB: the rx buffers may need to be reallocated */
-- 
2.25.1