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    SubjectRe: [PATCH v2 0/3] ahci: fix boot/resume COMRESET failures
    From
    On Mon, Mar 5, 2012 at 1:12 PM, cwillu <cwillu@cwillu.com> wrote:
    > On Sun, Mar 4, 2012 at 6:58 PM, Lin Ming <ming.m.lin@intel.com> wrote:
    >> On Fri, Mar 2, 2012 at 9:16 PM, cwillu <cwillu@cwillu.com> wrote:
    >>> On Tue, Feb 21, 2012 at 12:38 PM, Brian Norris
    >>> <computersforpeace@gmail.com> wrote:
    >>>> This series addresses regression problems with
    >>>>
    >>>>    commit 7faa33da9b7add01db9f1ad92c6a5d9145e940a7
    >>>>    ahci: start engine only during soft/hard resets
    >>>
    >>> I just spent the better part of last night tracking down the specific
    >>> sources of the log entry I get when I disconnect my e-sata drive; once
    >>> it disconnects, the port is dead until I reboot; no combination of
    >>> anything I've been able to poke at in /sys or elsewhere gets it live
    >>> again.  This starts with 3.3rc1, and turns out to still work fine in
    >>> 3.2.1. Any chance it's related?
    >>>
    >>> 3.3rc5, immediately after the unplug:
    >>
    >> Hi,
    >>
    >> I tested on my machine and it's fixed by below patch.
    >> http://marc.info/?l=linux-kernel&m=132996405028746&w=2
    >>
    >> Would you please also try it?
    >
    > Building it now, and will be able to test in about 5 hours.

    Hi,

    How about the test result?

    Regards,
    Lin Ming

    >
    > After looking at the thread, I spent another couple hours on poking
    > /sys, and did get the port to come back up and find the drive with the
    > following:
    >
    > echo on > /sys/devices/pci0000:00/0000:00:1f.2/ata5/power/control
    > echo on > /sys/devices/pci0000:00/0000:00:1f.2/ata5/host4/power/control
    > echo '- - -' > /sys/devices/pci0000:00/0000:00:1f.2/ata5/host4/scsi_host/host4/scan
    > --
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