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From: Adrian Chadd <adrian@FreeBSD.org>
Date: Sat, 28 Apr 2012 05:00:47 +0000 (UTC)
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Subject: svn commit: r234748 - head/sys/dev/ath
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Author: adrian
Date: Sat Apr 28 05:00:47 2012
New Revision: 234748
URL: http://svn.freebsd.org/changeset/base/234748

Log:
  Add a comment about this DELAY(), I'm not sure whether it's supposed
  to be for a DDR/FIFO flush or something else.

Modified:
  head/sys/dev/ath/if_ath.c

Modified: head/sys/dev/ath/if_ath.c
==============================================================================
--- head/sys/dev/ath/if_ath.c	Sat Apr 28 03:07:36 2012	(r234747)
+++ head/sys/dev/ath/if_ath.c	Sat Apr 28 05:00:47 2012	(r234748)
@@ -5417,6 +5417,10 @@ ath_stoprecv(struct ath_softc *sc, int d
 	ath_hal_stoppcurecv(ah);	/* disable PCU */
 	ath_hal_setrxfilter(ah, 0);	/* clear recv filter */
 	ath_hal_stopdmarecv(ah);	/* disable DMA engine */
+	/*
+	 * TODO: see if this particular DELAY() is required; it may be
+	 * masking some missing FIFO flush or DMA sync.
+	 */
 	if (dodelay)
 		DELAY(3000);		/* 3ms is long enough for 1 frame */
 #ifdef ATH_DEBUG