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From: Marius Strobl <marius@FreeBSD.org>
Date: Wed, 7 Jan 2009 21:25:44 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/dcons dcons_crom.c dcons_os.c
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marius      2009-01-07 21:25:44 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/dcons        dcons_crom.c dcons_os.c 
  Log:
  SVN rev 186876 on 2009-01-07 21:25:44Z by marius
  
  Check the return values of contigmalloc(9) as well as bus_dma(9)
  functions and stop attaching of dcons(4) and dcons_crom(4) if
  they indicate failure. This fixes a panic seen on sparc64 machines
  with no free physical memory in the requested 32-bit region but
  still doesn't make dcons(4)/dcons_crom(4) these work. I think
  the latter can be fixed by simply specifying ~0UL as the upper
  limit for contigmalloc(9) and letting the bounce pages and the
  IOMMU respectively handle limitations of the DMA engine. I didn't
  want to change that without the consensus of simokawa@ though,
  who unfortunately didn't reply so far.
  
  MFC after:      1 week
  
  Revision  Changes    Path
  1.11      +12 -3     src/sys/dev/dcons/dcons_crom.c
  1.25      +11 -7     src/sys/dev/dcons/dcons_os.c