From owner-cvs-all  Thu Aug 16 13:15:28 2001
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From: Bill Paul <wpaul@FreeBSD.org>
Date: Thu, 16 Aug 2001 13:15:16 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/pci if_sf.c
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wpaul       2001/08/16 13:15:16 PDT

  Modified files:
    sys/pci              if_sf.c 
  Log:
  After one more day of testing, make what I hope are the final tweaks to
  prevent/workaround TX lockups in this driver. The secret seems to be to
  not let the TX DMA queue become too full. If we have too many packets
  in the queue, we should wait for them to drain a bit before trying to
  queue more. This should prevent the lockup from occurring, and if it
  does occur, there is special code in sf_start() to kick the NIC in the
  head and get it going again.
  
  Special thanks to Glen Neff for helping me test this fix.
  
  Revision  Changes    Path
  1.39      +7 -5      src/sys/pci/if_sf.c


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