madwifi: fix division by zero

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13521 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/madwifi/patches/389-autochannel.patch

@@ -16,7 +16,7 @@
  	sc->sc_curchan.channel = ic->ic_curchan->ic_freq;
  	sc->sc_curchan.channelFlags = ath_chan2flags(ic->ic_curchan);
  	if (!ath_hal_reset(ah, sc->sc_opmode, &sc->sc_curchan, AH_FALSE, &status)) {
-@@ -2913,6 +2915,37 @@ ath_hw_check_atim(struct ath_softc *sc, 
+@@ -2913,6 +2915,40 @@ ath_hw_check_atim(struct ath_softc *sc, 
  }
  
  
@@ -38,6 +38,9 @@
 +
 +	rx = OS_REG_READ(ah, AR5K_RXCLEAR);
 +	cc = OS_REG_READ(ah, AR5K_CYCLES);
++	if (!cc)
++		return;
++
 +	if (rx > cc)
 +		return; /* wraparound */
 +
@@ -54,7 +57,7 @@
  /*
   * Reset the hardware w/o losing operational state.  This is
   * basically a more efficient way of doing ath_stop, ath_init,
-@@ -2939,6 +2972,7 @@ ath_reset(struct net_device *dev)
+@@ -2939,6 +2975,7 @@ ath_reset(struct net_device *dev)
  	 * Convert to a HAL channel description with the flags
  	 * constrained to reflect the current operating mode.
  	 */
@@ -62,7 +65,7 @@
  	c = ic->ic_curchan;
  	sc->sc_curchan.channel = c->ic_freq;
  	sc->sc_curchan.channelFlags = ath_chan2flags(c);
-@@ -9019,6 +9053,7 @@ ath_chan_set(struct ath_softc *sc, struc
+@@ -9019,6 +9056,7 @@ ath_chan_set(struct ath_softc *sc, struc
  	u_int8_t channel_change_required = 0;
  	struct timeval tv;
  

package/madwifi/patches/406-monitor_r3711.patch

@@ -1,6 +1,6 @@
 --- a/ath/if_ath.c
 +++ b/ath/if_ath.c
-@@ -6507,7 +6507,7 @@ ath_capture(struct net_device *dev, cons
+@@ -6510,7 +6510,7 @@ ath_capture(struct net_device *dev, cons
  
  	/* Never copy the SKB, as it is ours on the RX side, and this is the 
  	 * last process on the TX side and we only modify our own headers. */
@@ -9,7 +9,7 @@
  	if (tskb == NULL) {
  		DPRINTF(sc, ATH_DEBUG_ANY,
  			"Dropping; ath_skb_removepad failed!\n");
-@@ -6515,6 +6515,8 @@ ath_capture(struct net_device *dev, cons
+@@ -6518,6 +6518,8 @@ ath_capture(struct net_device *dev, cons
  	}
  	
  	ieee80211_input_monitor(ic, tskb, bf, tx, tsf, sc);

package/madwifi/patches/408-changeset_r3337.patch

@@ -10,7 +10,7 @@
  Please let us know if you think your name should be mentioned here!
 --- a/ath/if_ath.c
 +++ b/ath/if_ath.c
-@@ -3126,7 +3126,7 @@ ath_tx_startraw(struct net_device *dev, 
+@@ -3129,7 +3129,7 @@ ath_tx_startraw(struct net_device *dev, 
  	struct ath_softc *sc = dev->priv;
  	struct ath_hal *ah = sc->sc_ah;
  	struct ieee80211_phy_params *ph = (struct ieee80211_phy_params *)

package/madwifi/patches/450-new_hal.patch

@@ -108,7 +108,7 @@
  	/*
  	 * Check if the MAC has multi-rate retry support.
  	 * We do this by trying to setup a fake extended
-@@ -7521,7 +7529,7 @@ ath_txq_setup(struct ath_softc *sc, int 
+@@ -7524,7 +7532,7 @@ ath_txq_setup(struct ath_softc *sc, int 
  	if (qtype == HAL_TX_QUEUE_UAPSD)
  		qi.tqi_qflags = HAL_TXQ_TXDESCINT_ENABLE;
  	else