remove ad-hoc tx hang workaround - the underlying issue has been fixed a while ago

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7868 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/madwifi/patches/118-txstop_workaround.patch

@@ -1,49 +0,0 @@
-Index: madwifi-ng-r2525-20070630/ath/if_ath.c
-===================================================================
---- madwifi-ng-r2525-20070630.orig/ath/if_ath.c	2007-07-03 23:02:29.657897250 +0200
-+++ madwifi-ng-r2525-20070630/ath/if_ath.c	2007-07-03 23:02:29.917913500 +0200
-@@ -2253,6 +2253,17 @@
- 		txq->axq_link = &lastds->ds_link;
- 		ath_hal_txstart(ah, txq->axq_qnum);
- 		sc->sc_dev->trans_start = jiffies;
-+		if ((sc->sc_opmode == HAL_M_IBSS) || (sc->sc_opmode == HAL_M_HOSTAP)) {
-+			if (sc->sc_tx_start && (ath_hal_numtxpending(ah, txq->axq_qnum) > 2)) {
-+				if (jiffies > sc->sc_tx_start + 2 * HZ) {
-+					printk("%s: Tx queue stuck. Resetting hardware...\n", sc->sc_dev->name);
-+					ath_reset(sc->sc_dev);
-+					sc->sc_tx_start = 0;
-+				}
-+			} else {
-+				sc->sc_tx_start = jiffies;
-+			}
-+		}
- 	}
- 	ATH_TXQ_UNLOCK_IRQ(txq);
- 
-@@ -7312,6 +7323,7 @@
- 			__func__, ds);
- #else
- 		ds = bf->bf_desc;		/* NB: last descriptor */
-+		sc->sc_tx_start = 0;
- #endif
- 		ts = &bf->bf_dsstatus.ds_txstat;
- 		status = ath_hal_txprocdesc(ah, ds, ts);
-Index: madwifi-ng-r2525-20070630/ath/if_athvar.h
-===================================================================
---- madwifi-ng-r2525-20070630.orig/ath/if_athvar.h	2007-07-03 23:02:25.669648000 +0200
-+++ madwifi-ng-r2525-20070630/ath/if_athvar.h	2007-07-03 23:02:29.917913500 +0200
-@@ -690,6 +690,14 @@
- 	u_int sc_slottimeconf;			/* manual override for slottime */
- 	int16_t sc_channoise; 			/* Measured noise of current channel (dBm) */
- 	u_int64_t sc_tsf;			/* TSF at last rx interrupt */
-+
-+	/* 
-+	 * Several MiniPCI cards and most SoC revs frequently cease all transmission
-+	 * when operating in IBSS mode. The reason for this is unknown and could potentially
-+	 * be a hardware bug. This variable contains the timestamp of the last successful
-+	 * transmission and is checked when enqueueing new frames
-+	 */
-+	unsigned long sc_tx_start;
- };
- 
- typedef void (*ath_callback) (struct ath_softc *);