svn commit: r224799 - user/adrian/if_ath_tx/sys/dev/ath
Adrian Chadd
adrian at FreeBSD.org
Fri Aug 12 14:59:21 UTC 2011
Author: adrian
Date: Fri Aug 12 14:59:21 2011
New Revision: 224799
URL: http://svn.freebsd.org/changeset/base/224799
Log:
Fix some missing locks:
* I didn't delete an ATH_TXQ_UNLOCK() from ath_tx_cleanup(); do that
* Since the tid flush function now updates the BAW, the TXQ lock is required.
This may cause another LOR with the net80211 node lock. I'll investigate this
later.
Modified:
user/adrian/if_ath_tx/sys/dev/ath/if_ath_tx.c
Modified: user/adrian/if_ath_tx/sys/dev/ath/if_ath_tx.c
==============================================================================
--- user/adrian/if_ath_tx/sys/dev/ath/if_ath_tx.c Fri Aug 12 14:43:37 2011 (r224798)
+++ user/adrian/if_ath_tx/sys/dev/ath/if_ath_tx.c Fri Aug 12 14:59:21 2011 (r224799)
@@ -1873,19 +1873,13 @@ ath_tx_node_flush(struct ath_softc *sc,
ATH_TXQ_LOCK(txq);
/* Remove this tid from the list of active tids */
ath_tx_tid_unsched(sc, an, tid);
- if (! is_owned)
- ATH_TXQ_UNLOCK(txq);
/* Free packets */
ath_tx_tid_free_pkts(sc, an, tid);
- }
+ if (! is_owned)
+ ATH_TXQ_UNLOCK(txq);
- /*
- * Don't hold the node lock across free_pkts;
- * freeing buffers may release the node and
- * that will acquire the IEEE80211_NODE_LOCK (node table).
- * That then causes a lock reversal.
- */
+ }
}
/*
@@ -2047,8 +2041,6 @@ ath_tx_cleanup(struct ath_softc *sc, str
device_printf(sc->sc_dev,
"%s: TID %d: cleanup needed: %d packets\n",
__func__, tid, atid->incomp);
-
- ATH_TXQ_UNLOCK(txq);
}
static void
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