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    SubjectRe: [linux-pm] wacom + runtime PM = AA deadlock
    Date
    Am Dienstag, 14. September 2010, 17:23:15 schrieb Alan Stern:
    > On Tue, 14 Sep 2010, Oliver Neukum wrote:
    >
    > > > > Should I have used usb_autopm_get_interface_no_resume()?
    > > >
    > > > That actually would work. It's a good idea. The only drawback (not a
    > > > big one) is that if the device _was_ suspended with remote wakeup
    > > > enabled, doing this wouldn't turn off remote wakeup. I think that
    > > > doesn't matter.
    > >
    > > I am afraid it does matter as devices whose remote wakeup is enabled
    > > may draw more power.
    >
    > I doubt it, or at least, not very much more. They are still limited by
    > the USB spec as to the total amount of current they can draw while
    > suspended.

    7.2.3 Sources of remote wakeup may draw 2.5mA when suspended
    as opposed to 0.5 mA

    Regards
    Oliver


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