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    2007-05-15 16:26:02.721036296 +0200
   3 +++ madwifi.dev/ath/if_ath.c    2007-05-20 21:33:53.269103736 +0200
   4 @@ -1711,6 +1711,7 @@
   5                         }
   6  #endif
   7                         ATH_SCHEDULE_TQUEUE(&sc->sc_txtq, &needmark);
   8 +                       sc->sc_tx_start = 0;
   9                 }
  10                 if (status & HAL_INT_BMISS) {
  11                         sc->sc_stats.ast_bmiss++;
  12 @@ -2261,11 +2262,25 @@
  13                 txq->axq_link = &lastds->ds_link;
  14                 ath_hal_txstart(ah, txq->axq_qnum);
  15                 sc->sc_dev->trans_start = jiffies;
  16 +               if ((sc->sc_opmode == HAL_M_IBSS) || (sc->sc_opmode == HAL_M_HOSTAP)) {
  17 +                       unsigned long last;
  18 +                       last = sc->sc_tx_start;
  19 +                       if (last) {
  20 +                               if (jiffies > last + 2 * HZ) {
  21 +                                       printk("%s: Tx queue stuck. Resetting hardware...\n", sc->sc_dev->name);
  22 +                                       ath_reset(sc->sc_dev);
  23 +                                       sc->sc_tx_start = 0;
  24 +                               }
  25 +                       } else {
  26 +                               sc->sc_tx_start = jiffies;
  27 +                       }
  28 +               }
  29         }
  30         ATH_TXQ_UNLOCK(txq);
  31
  32         sc->sc_devstats.tx_packets++;
  33         sc->sc_devstats.tx_bytes += framelen;
  34 +       sc->sc_tx_start = 0;
  35  }
  36
  37  static int
  38 @@ -7272,7 +7287,7 @@
  39                 DPRINTF(sc, ATH_DEBUG_UAPSD, "%s: reaping U-APSD txq\n", __func__);
  40                 uapsdq = 1;
  41         }
  42 -
  43 +
  44         for (;;) {
  45                 if (uapsdq)
  46                         ATH_TXQ_UAPSDQ_LOCK_IRQ(txq);
  47 diff -ur madwifi.old/ath/if_athvar.h madwifi.dev/ath/if_athvar.h
  48 --- madwifi.old/ath/if_athvar.h 2007-05-04 23:09:29.000000000 +0200
  49 +++ madwifi.dev/ath/if_athvar.h 2007-05-15 16:26:28.911054808 +0200
  50 @@ -689,6 +689,14 @@
  51  #endif
  52         u_int sc_slottimeconf;                  /* manual override for slottime */
  53         int16_t sc_channoise;                   /* Measured noise of current channel (dBm) */
  54 +
  55 +       /*
  56 +        * Several MiniPCI cards and most SoC revs frequently cease all transmission
  57 +        * when operating in IBSS mode. The reason for this is unknown and could potentially
  58 +        * be a hardware bug. This variable contains the timestamp of the last successful
  59 +        * transmission and is checked when enqueueing new frames
  60 +        */
  61 +       unsigned long sc_tx_start;
  62  };
  63
  64  typedef void (*ath_callback) (struct ath_softc *);