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    SubjectRe: [PATCH] SATA / AHCI: Do not play with the link PM during suspend to RAM
    On 08/23/2010 08:58 PM, Rafael J. Wysocki wrote:
    > On Monday, August 23, 2010, Tejun Heo wrote:
    >> Hello, sorry about the delay.
    >>
    >> On 08/19/2010 06:23 PM, Stephan Diestelhorst wrote:
    >>> It says "max_performance", I have not touched anyhting. So it has been
    >>> like that all the time. Would this explain why your patch did not show
    >>> the debug printout?
    >>
    >> Hmm... okay. Yeah, if you haven't been using IPM at all, there won't
    >> be any debug messages but at the same time the posted patch should
    >> have had the same effect as Rafael's patch as IPM path isn't traveled
    >> at all. Can you please check the followings?
    >>
    >> * You're actually running the correct patched kernel and modules. It
    >> probably is a good idea to add a printk message. ie. Apply the
    >> patch and add a printk() in ata_host_request_pm() in libata-core.c
    >> and make sure the debug messages appears.
    >>
    >> * Rafael's patch actually fixes the problem. If you haven't been
    >> using IPM at all, Rafael's patch and mine should behave exactly the
    >> same (ie. no IPM operation at all during suspend/resume). It could
    >> be that you're seeing a different issue.
    >>
    >> Rafael, can you please test my patch and see how your case behaves?
    >
    > This one: http://lkml.org/lkml/2010/8/5/328 ?

    Yeap, that one. I can prep a test git branch if necessary.

    Thanks.

    --
    tejun


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