package/madwifi/patches/301-tx_locking.patch

   1 Index: madwifi-ng-r2799-20071030/ath/if_ath.c
   2 ===================================================================
   3 --- madwifi-ng-r2799-20071030.orig/ath/if_ath.c 2007-10-31 14:04:51.313545672 +0100
   4 +++ madwifi-ng-r2799-20071030/ath/if_ath.c      2007-10-31 14:04:51.569560260 +0100
   5 @@ -2693,7 +2693,7 @@
   6         /* NB: use this lock to protect an->an_tx_ffbuf (and txq->axq_stageq)
   7          *      in athff_can_aggregate() call too.
   8          */
   9 -       ATH_TXQ_LOCK_IRQ(txq);
  10 +       ATH_TXQ_LOCK_BH(txq);
  11         if (athff_can_aggregate(sc, eh, an, skb, vap->iv_fragthreshold, &ff_flush)) {
  12                 if (an->an_tx_ffbuf[skb->priority]) { /* i.e., frame on the staging queue */
  13                         bf = an->an_tx_ffbuf[skb->priority];
  14 @@ -2701,6 +2701,7 @@
  15                         /* get (and remove) the frame from staging queue */
  16                         TAILQ_REMOVE(&txq->axq_stageq, bf, bf_stagelist);
  17                         an->an_tx_ffbuf[skb->priority] = NULL;
  18 +                       ATH_TXQ_UNLOCK_BH(txq);
  19
  20                         /*
  21                          * chain skbs and add FF magic
  22 @@ -2723,7 +2724,7 @@
  23                          */
  24                         ATH_HARDSTART_GET_TX_BUF_WITH_LOCK;
  25                         if (bf == NULL) {
  26 -                               ATH_TXQ_UNLOCK_IRQ_EARLY(txq);
  27 +                               ATH_TXQ_UNLOCK_BH(txq);
  28                                 goto hardstart_fail;
  29                         }
  30                         DPRINTF(sc, ATH_DEBUG_XMIT | ATH_DEBUG_FF,
  31 @@ -2735,8 +2736,7 @@
  32                         an->an_tx_ffbuf[skb->priority] = bf;
  33
  34                         TAILQ_INSERT_HEAD(&txq->axq_stageq, bf, bf_stagelist);
  35 -
  36 -                       ATH_TXQ_UNLOCK_IRQ_EARLY(txq);
  37 +                       ATH_TXQ_UNLOCK_BH(txq);
  38
  39                         return NETDEV_TX_OK;
  40                 }
  41 @@ -2749,7 +2749,7 @@
  42                         an->an_tx_ffbuf[skb->priority] = NULL;
  43
  44                         /* NB: ath_tx_start -> ath_tx_txqaddbuf uses ATH_TXQ_LOCK too */
  45 -                       ATH_TXQ_UNLOCK_IRQ_EARLY(txq);
  46 +                       ATH_TXQ_UNLOCK_BH(txq);
  47
  48                         /* encap and xmit */
  49                         bf_ff->bf_skb = ieee80211_encap(ni, bf_ff->bf_skb, &framecnt);
  50 @@ -2798,12 +2798,12 @@
  51
  52                 ATH_HARDSTART_GET_TX_BUF_WITH_LOCK;
  53                 if (bf == NULL) {
  54 -                       ATH_TXQ_UNLOCK_IRQ_EARLY(txq);
  55 +                       ATH_TXQ_UNLOCK_BH(txq);
  56                         goto hardstart_fail;
  57                 }
  58 +               ATH_TXQ_UNLOCK_BH(txq);
  59         }
  60
  61 -       ATH_TXQ_UNLOCK_IRQ(txq);
  62
  63  ff_flush_done:
  64  ff_bypass:
  65 Index: madwifi-ng-r2799-20071030/ath/if_athvar.h
  66 ===================================================================
  67 --- madwifi-ng-r2799-20071030.orig/ath/if_athvar.h      2007-10-31 14:04:51.317545898 +0100
  68 +++ madwifi-ng-r2799-20071030/ath/if_athvar.h   2007-10-31 14:04:51.569560260 +0100
  69 @@ -504,6 +504,8 @@
  70  #define ATH_TXQ_INTR_PERIOD            5  /* axq_intrcnt period for intr gen */
  71  #define        ATH_TXQ_LOCK_INIT(_tq)          spin_lock_init(&(_tq)->axq_lock)
  72  #define        ATH_TXQ_LOCK_DESTROY(_tq)
  73 +#define ATH_TXQ_LOCK_BH(_tq)           spin_lock_bh(&(_tq)->axq_lock);
  74 +#define ATH_TXQ_UNLOCK_BH(_tq)         spin_unlock_bh(&(_tq)->axq_lock);
  75  #define ATH_TXQ_LOCK_IRQ(_tq)          do {                            \
  76         unsigned long __axq_lockflags;                                  \
  77         spin_lock_irqsave(&(_tq)->axq_lock, __axq_lockflags);