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From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Mon, 28 Mar 2011 00:14:56 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/dc if_dc.c
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yongari     2011-03-28 00:14:56 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/dev/dc           if_dc.c 
  Log:
  SVN rev 220084 on 2011-03-28 00:14:56Z by yongari
  
  MFC r219701:
    Remove too expensive bus_dmamap_sync(9) call in dc_rx_resync().
    With this change, driver may not notice updated descriptor status
    change when bounce buffers are active. However, rxeof() in next run
    will handle the synchronization.
  
    Change dc_rxeof() a bit to return the number of processed frames in
    RX descriptor ring. Previously it returned the number of frames
    that were successfully passed to upper stack which in turn means it
    ignored frames that were discarded due to errors. The number of
    processed frames in RX descriptor ring is used to detect whether
    driver is out of sync with controller's current descriptor pointer.
    Returning number of processed frames reduces unnecessary (probably
    wrong) re-synchronization.
  
    Reviewed by:  marius
  
  Revision    Changes    Path
  1.192.2.17  +10 -13    src/sys/dev/dc/if_dc.c