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From: John Baldwin <jhb@FreeBSD.org>
Date: Fri, 16 Jan 2009 22:22:30 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/pci pci.c
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jhb         2009-01-16 22:22:30 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/pci          pci.c 
  Log:
  SVN rev 187348 on 2009-01-16 22:22:30Z by jhb
  
  Disable decoding of BARs by devices before we trash the value in the BAR
  by writing all 1's to it to determine its length.  This fixes issues with
  MCFG on at least some machines where a trashed BAR claimed subsequent
  attempts at PCI config transactions because the addresses in the MCFG
  window fell in the decoding range of the BAR.
  
  In general it is a bad idea to leave the BARs enabled while we are
  frobbing with them in this manner.
  
  Sleuthing by:  tegge
  MFC after:     1 week
  
  Revision  Changes    Path
  1.367     +18 -0     src/sys/dev/pci/pci.c