On Thursday 11 October 2012 16:14:02 Ming Lei wrote:
> On Thu, Oct 11, 2012 at 12:11 PM, Oliver Neukum <oneu...@suse.de> wrote:
> > On Thursday 11 October 2012 11:18:22 Ming Lei wrote:
>
> >> Currently scsi disk can only be runtime suspended when the device is not
> >> opened, so are you sure that the paging out above can cause IO on a suspend
> >> usb mass storage disk which is not mounted or opened by utility now?
> >
> > We definitely do not wish to keep it that way. People at Intel are
> > currently working
> > on better power management for sd, which would allow full autosuspend.
>
> OK, got it.
>
> For auto-resume situation, it can be solved with switching the gpf_t flag
> runtime inside helper, but I think it is better to do it after the sd's
> full autosuspend is seen in -next tree.
That depends on whether an API change would be necessary.
Changing the code only when necessary is no problem. But the
API I want to do right from the beginning if that is possible.
This depends on whether you get in your extension to task_struct.
If you do, we can certainly use it also for the suspend case.
> For error handling case, it is inevitably for usbnet to allocate memory
> with GFP_KERNEL because no usbnet drivers have implemented
> .pre_reset and .post_reset callback, and no such actual problems
> have been reported until now, so it should be OK to not consider the
> case now.
>
> So could we merge the patch set[1-11] first?
Given the solution for error handling you came up with, yes, we can.
Would you resubmit?
Regards
Oliver
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