Re: [linux-usb-devel] Re: OHCI problems with suspend/resume

From: David Brownell (david-b_at_pacbell.net)
Date: 07/31/03

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    Date:	Thu, 31 Jul 2003 10:32:33 -0700
To: Pavel Machek <pavel@suse.cz>

    Pavel Machek wrote:

    >>USB drivers don't talk suspend/resume yet, so they
    >>won't notice missing features there. Regressions
    >>are a different story though.
    >>
    >>But I can imagine that usb-storage (or is that SCSI?)
    >>might want to veto suspending devices that are being
    >>used for some kinds of i/o. Eventually it should exist.
    >
    >
    > For what kind of I/O? I do not see a reason for disk to veto
    > suspend. CD-burner might want to do that, but it still would be bad
    > idea... (Running on battery, battery goes low, and you destroy your CD
    > *and* your filesystem.

    If it's in the middle of any kind of write, suspending would
    seem to be unwise. Say, writing to a swap partition...

    Mostly I'm just saying that if vetoing ever makes sense
    (and I understand that it does), USB drivers will need
    to understand it too.

    - Dave

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