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From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Fri, 6 May 2011 22:36:43 +0000 (UTC)
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Subject: svn commit: r221560 - head/sys/dev/xl
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Author: yongari
Date: Fri May  6 22:36:43 2011
New Revision: 221560
URL: http://svn.freebsd.org/changeset/base/221560

Log:
  Call bus_dmamap_sync() only after TX DPD update.

Modified:
  head/sys/dev/xl/if_xl.c

Modified: head/sys/dev/xl/if_xl.c
==============================================================================
--- head/sys/dev/xl/if_xl.c	Fri May  6 22:31:27 2011	(r221559)
+++ head/sys/dev/xl/if_xl.c	Fri May  6 22:36:43 2011	(r221560)
@@ -2644,8 +2644,6 @@ xl_start_locked(struct ifnet *ifp)
 	 * once for each packet.
 	 */
 	cur_tx->xl_ptr->xl_status |= htole32(XL_TXSTAT_DL_INTR);
-	bus_dmamap_sync(sc->xl_ldata.xl_tx_tag, sc->xl_ldata.xl_tx_dmamap,
-	    BUS_DMASYNC_PREWRITE);
 
 	/*
 	 * Queue the packets. If the TX channel is clear, update
@@ -2666,6 +2664,8 @@ xl_start_locked(struct ifnet *ifp)
 		sc->xl_cdata.xl_tx_head = start_tx;
 		sc->xl_cdata.xl_tx_tail = cur_tx;
 	}
+	bus_dmamap_sync(sc->xl_ldata.xl_tx_tag, sc->xl_ldata.xl_tx_dmamap,
+	    BUS_DMASYNC_PREWRITE);
 	if (!CSR_READ_4(sc, XL_DOWNLIST_PTR))
 		CSR_WRITE_4(sc, XL_DOWNLIST_PTR, start_tx->xl_phys);
 
@@ -2765,12 +2765,12 @@ xl_start_90xB_locked(struct ifnet *ifp)
 	 * once for each packet.
 	 */
 	cur_tx->xl_ptr->xl_status |= htole32(XL_TXSTAT_DL_INTR);
-	bus_dmamap_sync(sc->xl_ldata.xl_tx_tag, sc->xl_ldata.xl_tx_dmamap,
-	    BUS_DMASYNC_PREWRITE);
 
 	/* Start transmission */
 	sc->xl_cdata.xl_tx_prod = idx;
 	start_tx->xl_prev->xl_ptr->xl_next = htole32(start_tx->xl_phys);
+	bus_dmamap_sync(sc->xl_ldata.xl_tx_tag, sc->xl_ldata.xl_tx_dmamap,
+	    BUS_DMASYNC_PREWRITE);
 
 	/*
 	 * Set a timeout in case the chip goes out to lunch.