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Date: Mon, 8 Apr 1996 12:38:59 -0700 (PDT)
From: Sujal Patel <smpatel>
Message-Id: <199604081938.MAA21202@freefall.freebsd.org>
To: CVS-committers, cvs-all, cvs-sys
Subject: cvs commit:  src/sys/i386/isa isa.c isa_device.h
Sender: owner-cvs-sys@FreeBSD.ORG
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smpatel     96/04/08 12:38:58

  Modified:    sys/i386/isa  isa.c isa_device.h
  Log:
  Add a lock for DMA Channels to prevent two devices from using the same DMA
  channel at the same time.  The functions isa_dma_acquire() and
  isa_dma_release() should be used in all ISA drivers which call isa_dmastart().
  This can be used more generally to register the usage of DMA channels in
  any driver, but it is required for drivers using isa_dmastart() and friends.
  
  Clean up sanity checks, error messages, etc.
  Remove isa_dmadone_nobounce(), it is no longer needed
  
  Reviewed by:	bde
  
  Revision  Changes    Path
  1.67      +112 -44   src/sys/i386/isa/isa.c
  1.29      +6 -6      src/sys/i386/isa/isa_device.h