From owner-cvs-all  Tue Feb  4  8:30:30 2003
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From: Hartmut Brandt <harti@FreeBSD.org>
Date: Tue, 4 Feb 2003 08:30:27 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/alpha/alpha busdma_machdep.c src/sys/powerpc/powerpc
         busdma_machdep.c src/sys/ia64/ia64 busdma_machdep.c
         src/sys/i386/i386 busdma_machdep.c src/sys/sparc64/sparc64
         bus_machdep.c
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harti       2003/02/04 08:30:27 PST

  Modified files:
    sys/alpha/alpha      busdma_machdep.c 
    sys/powerpc/powerpc  busdma_machdep.c 
    sys/ia64/ia64        busdma_machdep.c 
    sys/i386/i386        busdma_machdep.c 
    sys/sparc64/sparc64  bus_machdep.c 
  Log:
  Fix a problem in bus_dmamap_load_{mbuf,uio} when the first mbuf or the first
  uio segment is empty. In this case no dma segment is create by
  bus_dmamap_load_buffer, but the calling routine clears the first flag.
  Under certain combinations of addresses of the first and second mbuf/uio
  buffer this leads to corrupted DMA segment descriptors. This was already
  fixed by tmm in sparc64/sparc64/iommu.c.
  
  PR:             kern/47733
  Reviewed by:    sam
  Approved by:    jake (mentor)
  
  Revision  Changes    Path
  1.28      +16 -11    src/sys/alpha/alpha/busdma_machdep.c
  1.32      +16 -11    src/sys/i386/i386/busdma_machdep.c
  1.14      +16 -11    src/sys/ia64/ia64/busdma_machdep.c
  1.7       +12 -8     src/sys/powerpc/powerpc/busdma_machdep.c
  1.19      +12 -8     src/sys/sparc64/sparc64/bus_machdep.c

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