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From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Mon, 14 Dec 2009 19:08:11 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/vge if_vge.c
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yongari     2009-12-14 19:08:11 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/vge          if_vge.c 
  Log:
  SVN rev 200529 on 2009-12-14 19:08:11Z by yongari
  
  Clear VGE_TXDESC_Q bit for transmitted frames. The VGE_TXDESC_Q bit
  seems to work like a tag that indicates 'not list end' of queued
  frames. Without having a VGE_TXDESC_Q bit indicates 'list end'. So
  the last frame of multiple queued frames has no VGE_TXDESC_Q bit.
  The hardware has peculiar behavior for VGE_TXDESC_Q bit handling.
  If the VGE_TXDESC_Q bit of descriptor was set the controller would
  fetch next descriptor. However if next descriptor's OWN bit was
  cleared but VGE_TXDESC_Q was set, it could confuse controller.
  Clearing VGE_TXDESC_Q bit for transmitted frames ensure correct
  behavior.
  
  Revision  Changes    Path
  1.48      +4 -1      src/sys/dev/vge/if_vge.c