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From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Mon, 28 Feb 2011 20:37:48 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/sis if_sis.c if_sisreg.h
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yongari     2011-02-28 20:37:48 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/sis          if_sis.c if_sisreg.h 
  Log:
  SVN rev 219102 on 2011-02-28 20:37:48Z by yongari
  
  Make sure changing ownership of RX descriptor to be done as last
  operation.  Previously ownership was transferred to hardware before
  setting address of new RX buffer such that it was possible for
  hardware to use wrong RX buffer address.
  While here keep compiler from re-ordering instructions by declaring
  descriptor members volatile. Memory barriers would do the same job
  but volatile is supposed to be cheaper than using memory barriers,
  especially on MP systems.
  
  Submitted by:   marius
  MFC after:      1 week
  
  Revision  Changes    Path
  1.31      +1 -1      src/sys/dev/sis/if_sis.c
  1.11      +2 -2      src/sys/dev/sis/if_sisreg.h