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From: "Matthew N. Dodd" <mdodd@FreeBSD.org>
Date: Wed, 2 Mar 2005 03:59:28 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
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Subject: cvs commit: src/sys/dev/ata ata-lowlevel.c
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mdodd       2005-03-02 03:59:28 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/ata          ata-lowlevel.c 
  Log:
  Handle PIO timeouts in ata_end_transaction() by immediately returning.
  Failure to do this will result in following ata_pio_read() calls walking
  off the end of the read buffer.
  
  This resolves the "memory modified after free" panics common with Thinkpads
  and CD/DVD drives.
  
  Submitted by:    Nate Lawson <nate AT root.org>
  
  Revision  Changes    Path
  1.53      +3 -0      src/sys/dev/ata/ata-lowlevel.c