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    SubjectRe: [Bug #14730] sky2 won't work after suspend/resume cycle
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    On Tuesday 29 December 2009, OGAWA Hirofumi wrote:
    > "Rafael J. Wysocki" <rjw@sisk.pl> writes:
    >
    > > This message has been generated automatically as a part of a report
    > > of regressions introduced between 2.6.31 and 2.6.32.
    > >
    > > The following bug entry is on the current list of known regressions
    > > introduced between 2.6.31 and 2.6.32. Please verify if it still should
    > > be listed and let me know (either way).
    > >
    > >
    > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=14730
    > > Subject : sky2 won't work after suspend/resume cycle
    > > Submitter : Maciej J. Woloszyk <mat@esi.com.pl>
    > > Date : 2009-12-04 09:02 (26 days old)
    >
    > This seems to be related to commit 4b77b0a2ba27d64f58f16d8d4d48d8319dda36ff.
    >
    > It clears dev->state_saved blindly, but pci_pm_resume() calls
    > pci_restore_standard_config() before pm->resume() (by probably
    > historical reason).

    The other way around. pci_restore_standard_config() is the new thing and the
    pci_restore_state() in ->resume() is supposed to be unnecessary. Unfortunately
    in this case the restoration of PCI config registers in
    pci_restore_standard_config() doesn't work.

    I'd like to understand the reason, but temporarily we can just set
    pdev->state_saved to 1 in sky2_resume(), as proposed in the bug entry.

    > So, I guess it became the cause of restore regression before changing
    > PCI power state. It might be better to revert
    > 4b77b0a2ba27d64f58f16d8d4d48d8319dda36ff for now, until changing pci
    > generic stuff.

    In fact 4b77b0a2ba27 is a bug fix so I'm afraid it won't be safe to revert it.

    Rafael


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