Messages in this thread | | | Date | Thu, 31 Jul 2003 19:31:07 +0200 | From | Pavel Machek <> | Subject | Re: [linux-usb-devel] Re: OHCI problems with suspend/resume |
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Hi!
> >>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...
We already know it is not... We stopped all user tasks for this purpose. Also the device has opportunity to simply wait inside SAVE_STATE for a write to finish.
> 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.
Agreed. Pavel
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