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From: Alexander Motin <mav@FreeBSD.org>
Date: Fri, 20 Feb 2009 23:17:52 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sys/dev/ata/chipsets ata-ahci.c
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mav         2009-02-20 23:17:52 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/ata/chipsets ata-ahci.c 
  Log:
  SVN rev 188877 on 2009-02-20 23:17:52Z by mav
  
  Disable port hardware on detach. First switch it to slumber mode to
  power-down peer transmitter, then disable completely.
  Side effect of this is saving about 0.5W of power per detached device.
  
  Revision  Changes    Path
  1.12      +16 -0     src/sys/dev/ata/chipsets/ata-ahci.c