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From: Dag-Erling Smorgrav <des@FreeBSD.org>
Date: Sun, 30 Oct 2005 10:03:11 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
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Cc: 
Subject: cvs commit: src/sys/dev/sound/pcm dsp.c
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des         2005-10-30 10:03:11 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/sound/pcm    dsp.c 
  Log:
  Add some safeguards to AIOSFMT:
  
   - Return EINVAL if play_format or rec_format is set but the corresponding
     sample rate is 0.
  
   - Don't try to set the playback or recording format to 0.  Previously,
     issuing an AIOSFMT ioctl with an all-zeroes snd_chan_param would
     trigger a KASSERT in chn_fmtchain(); I'm unsure about the effects on
     a kernel without INVARIANTS.  After this commit, issuing AIOSFMT with
     an all-zeroes snd_chan_param is equivalent to issuing AIOGFMT.
  
  MFC after:      2 weeks
  
  Revision  Changes    Path
  1.86      +8 -2      src/sys/dev/sound/pcm/dsp.c