minor locking change

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7436 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/madwifi/patches/301-tx_locking.patch b/package/madwifi/patches/301-tx_locking.patch
new file mode 100644 (file)
index 0000000..884035d
--- /dev/null
+++ b/package/madwifi/patches/301-tx_locking.patch
@@ -0,0 +1,67 @@
+diff -ur madwifi.old/ath/if_ath.c madwifi.dev/ath/if_ath.c
+--- madwifi.old/ath/if_ath.c   2007-06-01 16:44:25.170898128 +0200
++++ madwifi.dev/ath/if_ath.c   2007-06-01 20:01:24.205131816 +0200
+@@ -2555,7 +2555,7 @@
+       /* NB: use this lock to protect an->an_ff_txbuf in athff_can_aggregate()
+        *     call too.
+        */
+-      ATH_TXQ_LOCK_IRQ(txq);
++      ATH_TXQ_LOCK_BH(txq);
+       if (athff_can_aggregate(sc, eh, an, skb, vap->iv_fragthreshold, &ff_flush)) {
+               if (an->an_tx_ffbuf[skb->priority]) { /* i.e., frame on the staging queue */
+                       bf = an->an_tx_ffbuf[skb->priority];
+@@ -2563,6 +2563,7 @@
+                       /* get (and remove) the frame from staging queue */
+                       TAILQ_REMOVE(&txq->axq_stageq, bf, bf_stagelist);
+                       an->an_tx_ffbuf[skb->priority] = NULL;
++                      ATH_TXQ_UNLOCK_BH(txq);
+ 
+                       /*
+                        * chain skbs and add FF magic
+@@ -2585,7 +2586,7 @@
+                        */
+                       ATH_HARDSTART_GET_TX_BUF_WITH_LOCK;
+                       if (bf == NULL) {
+-                              ATH_TXQ_UNLOCK_IRQ_EARLY(txq);
++                              ATH_TXQ_UNLOCK_BH(txq);
+                               goto hardstart_fail;
+                       }
+                       DPRINTF(sc, ATH_DEBUG_XMIT | ATH_DEBUG_FF,
+@@ -2597,8 +2598,7 @@
+                       an->an_tx_ffbuf[skb->priority] = bf;
+ 
+                       TAILQ_INSERT_HEAD(&txq->axq_stageq, bf, bf_stagelist);
+-
+-                      ATH_TXQ_UNLOCK_IRQ_EARLY(txq);
++                      ATH_TXQ_UNLOCK_BH(txq);
+ 
+                       return 0;
+               }
+@@ -2650,12 +2650,12 @@
+ 
+               ATH_HARDSTART_GET_TX_BUF_WITH_LOCK;
+               if (bf == NULL) {
+-                      ATH_TXQ_UNLOCK_IRQ_EARLY(txq);
++                      ATH_TXQ_UNLOCK_BH(txq);
+                       goto hardstart_fail;
+               }
++              ATH_TXQ_UNLOCK_BH(txq);
+       }
+ 
+-      ATH_TXQ_UNLOCK_IRQ(txq);
+ 
+ ff_bypass:
+ 
+diff -ur madwifi.old/ath/if_athvar.h madwifi.dev/ath/if_athvar.h
+--- madwifi.old/ath/if_athvar.h        2007-06-01 16:44:25.149901320 +0200
++++ madwifi.dev/ath/if_athvar.h        2007-06-01 20:00:06.916881416 +0200
+@@ -484,6 +484,8 @@
+ #define ATH_TXQ_INTR_PERIOD           5  /* axq_intrcnt period for intr gen */
+ #define       ATH_TXQ_LOCK_INIT(_tq)          spin_lock_init(&(_tq)->axq_lock)
+ #define       ATH_TXQ_LOCK_DESTROY(_tq)
++#define ATH_TXQ_LOCK_BH(_tq)          spin_lock_bh(&(_tq)->axq_lock);
++#define ATH_TXQ_UNLOCK_BH(_tq)                spin_unlock_bh(&(_tq)->axq_lock);
+ #define ATH_TXQ_LOCK_IRQ(_tq)         do {                            \
+       unsigned long __axq_lockflags;                                  \
+       spin_lock_irqsave(&(_tq)->axq_lock, __axq_lockflags);
+