package/madwifi/patches/118-txstop_workaround.patch

   1 diff -ur madwifi.old/ath/if_ath.c madwifi.dev/ath/if_ath.c
   2 --- madwifi.old/ath/if_ath.c    2007-05-21 07:45:03.185429104 +0200
   3 +++ madwifi.dev/ath/if_ath.c    2007-05-21 07:45:55.867420224 +0200
   4 @@ -2206,6 +2206,17 @@
   5                 txq->axq_link = &lastds->ds_link;
   6                 ath_hal_txstart(ah, txq->axq_qnum);
   7                 sc->sc_dev->trans_start = jiffies;
   8 +               if ((sc->sc_opmode == HAL_M_IBSS) || (sc->sc_opmode == HAL_M_HOSTAP)) {
   9 +                       if (sc->sc_tx_start && (ath_hal_numtxpending(ah, txq->axq_qnum) > 2)) {
  10 +                               if (jiffies > sc->sc_tx_start + 2 * HZ) {
  11 +                                       printk("%s: Tx queue stuck. Resetting hardware...\n", sc->sc_dev->name);
  12 +                                       ath_reset(sc->sc_dev);
  13 +                                       sc->sc_tx_start = 0;
  14 +                               }
  15 +                       } else {
  16 +                               sc->sc_tx_start = jiffies;
  17 +                       }
  18 +               }
  19         }
  20         ATH_TXQ_UNLOCK(txq);
  21
  22 @@ -7246,6 +7257,7 @@
  23                         __func__, ds);
  24  #else
  25                 ds = bf->bf_desc;               /* NB: last descriptor */
  26 +               sc->sc_tx_start = 0;
  27  #endif
  28                 ts = &bf->bf_dsstatus.ds_txstat;
  29                 status = ath_hal_txprocdesc(ah, ds, ts);
  30 diff -ur madwifi.old/ath/if_athvar.h madwifi.dev/ath/if_athvar.h
  31 --- madwifi.old/ath/if_athvar.h 2007-05-18 13:19:16.000000000 +0200
  32 +++ madwifi.dev/ath/if_athvar.h 2007-05-21 07:45:37.720179024 +0200
  33 @@ -684,6 +684,14 @@
  34  #endif
  35         u_int sc_slottimeconf;                  /* manual override for slottime */
  36         int16_t sc_channoise;                   /* Measured noise of current channel (dBm) */
  37 +
  38 +       /*
  39 +        * Several MiniPCI cards and most SoC revs frequently cease all transmission
  40 +        * when operating in IBSS mode. The reason for this is unknown and could potentially
  41 +        * be a hardware bug. This variable contains the timestamp of the last successful
  42 +        * transmission and is checked when enqueueing new frames
  43 +        */
  44 +       unsigned long sc_tx_start;
  45  };
  46
  47  typedef void (*ath_callback) (struct ath_softc *);