package/madwifi/patches/118-txstop_workaround.patch

   1 Index: madwifi-ng-r2420-20070602/ath/if_ath.c
   2 ===================================================================
   3 --- madwifi-ng-r2420-20070602.orig/ath/if_ath.c 2007-06-04 13:21:56.713354928 +0200
   4 +++ madwifi-ng-r2420-20070602/ath/if_ath.c      2007-06-04 13:21:56.911324832 +0200
   5 @@ -2242,6 +2242,17 @@
   6                 txq->axq_link = &lastds->ds_link;
   7                 ath_hal_txstart(ah, txq->axq_qnum);
   8                 sc->sc_dev->trans_start = jiffies;
   9 +               if ((sc->sc_opmode == HAL_M_IBSS) || (sc->sc_opmode == HAL_M_HOSTAP)) {
  10 +                       if (sc->sc_tx_start && (ath_hal_numtxpending(ah, txq->axq_qnum) > 2)) {
  11 +                               if (jiffies > sc->sc_tx_start + 2 * HZ) {
  12 +                                       printk("%s: Tx queue stuck. Resetting hardware...\n", sc->sc_dev->name);
  13 +                                       ath_reset(sc->sc_dev);
  14 +                                       sc->sc_tx_start = 0;
  15 +                               }
  16 +                       } else {
  17 +                               sc->sc_tx_start = jiffies;
  18 +                       }
  19 +               }
  20         }
  21         ATH_TXQ_UNLOCK_IRQ(txq);
  22
  23 @@ -7285,6 +7296,7 @@
  24                         __func__, ds);
  25  #else
  26                 ds = bf->bf_desc;               /* NB: last descriptor */
  27 +               sc->sc_tx_start = 0;
  28  #endif
  29                 ts = &bf->bf_dsstatus.ds_txstat;
  30                 status = ath_hal_txprocdesc(ah, ds, ts);
  31 Index: madwifi-ng-r2420-20070602/ath/if_athvar.h
  32 ===================================================================
  33 --- madwifi-ng-r2420-20070602.orig/ath/if_athvar.h      2007-06-04 13:21:53.369863216 +0200
  34 +++ madwifi-ng-r2420-20070602/ath/if_athvar.h   2007-06-04 13:21:56.911324832 +0200
  35 @@ -686,6 +686,14 @@
  36         u_int sc_slottimeconf;                  /* manual override for slottime */
  37         int16_t sc_channoise;                   /* Measured noise of current channel (dBm) */
  38         u_int64_t sc_tsf;                       /* TSF at last rx interrupt */
  39 +
  40 +       /*
  41 +        * Several MiniPCI cards and most SoC revs frequently cease all transmission
  42 +        * when operating in IBSS mode. The reason for this is unknown and could potentially
  43 +        * be a hardware bug. This variable contains the timestamp of the last successful
  44 +        * transmission and is checked when enqueueing new frames
  45 +        */
  46 +       unsigned long sc_tx_start;
  47  };
  48
  49  typedef void (*ath_callback) (struct ath_softc *);