Author: adrian
Date: Wed Sep 28 03:11:51 2011
New Revision: 225822
URL: http://svn.freebsd.org/changeset/base/225822
Log:
Don't bother triggering the cabq queue if it's empty.
Obtained from: Atheros
Modified:
head/sys/dev/ath/if_ath.c
Modified: head/sys/dev/ath/if_ath.c
==============================================================================
--- head/sys/dev/ath/if_ath.c Wed Sep 28 03:07:51 2011 (r225821)
+++ head/sys/dev/ath/if_ath.c Wed Sep 28 03:11:51 2011 (r225822)
@@ -2619,7 +2619,8 @@ ath_beacon_generate(struct ath_softc *sc
sc->sc_stats.ast_cabq_xmit += nmcastq;
}
/* NB: gated by beacon so safe to start here */
- ath_hal_txstart(ah, cabq->axq_qnum);
+ if (! STAILQ_EMPTY(&(cabq->axq_q)))
+ ath_hal_txstart(ah, cabq->axq_qnum);
ATH_TXQ_UNLOCK(&avp->av_mcastq);
ATH_TXQ_UNLOCK(cabq);
}
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