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Message-Id: <200209080445.g884jGXq045950@freefall.freebsd.org>
From: Jake Burkholder <jake@FreeBSD.org>
Date: Sat, 7 Sep 2002 21:45:16 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern subr_witness.c src/sys/dev/sab sab.c
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jake        2002/09/07 21:45:16 PDT

  Modified files:
    sys/kern             subr_witness.c 
    sys/dev/sab          sab.c 
  Log:
  Make this driver work a whole lot better.
  - Get the initial mode from the prom settings and don't clobber the mode
    on open.
  - Copy output into an internal ring buffer instead of accessing the tty
    outq directly in the interrupt handler.  This fixes a problem where
    garbage would show up in the output stream.
  - Reset the console port completely and reprogram all the parameters
    before enabling it.  This fixes seemingly random hangs on startup
    when using a fast interrupt handler.
  - Add minimal locking in place of spls.
  - Remove dead code and minor cleanups.
  
  Revision  Changes    Path
  1.3       +168 -140  src/sys/dev/sab/sab.c
  1.124     +1 -0      src/sys/kern/subr_witness.c

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