git: AHCI - Fix bricking issue with older chipsets on boot.

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

commit 4e21f4dab73c836b48a013b705232779decb6f1a
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date:   Wed Aug 19 00:11:31 2009 -0700

    AHCI - Fix bricking issue with older chipsets on boot.
    
    * It looks like the use of AHCI_PREG_SCTL_DET_DISABLE, which turns off
      the phy on port, can brick the AHCI chip and even take out the entire
      machine.  This seems to effect Intel chips the most.
    
      Stop using it entirely.
    
    Reports-from: Rumko, Alexander Polakov

Summary of changes:
 sys/dev/disk/ahci/ahci.c |   47 +++++++++++++++++++++++++++++++--------------
 1 files changed, 32 insertions(+), 15 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/4e21f4dab73c836b48a013b705232779decb6f1a


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