Re: [PATCH v5 1/2] USB: add switch to turn off padding of resume time delays

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Am Mittwoch, den 11.01.2017, 21:06 +0200 schrieb Felipe Balbi:

> Hi,
> 
> Todd Brandt <todd.e.brandt@xxxxxxxxxxxxxxx> writes:
> > 
> > On Mon, 2017-01-09 at 09:44 +0100, Oliver Neukum wrote:
> > Well my main purpose in getting this out there is to get the seed
> > planted for further optimization. The focus right now is just
> > advanced
> > users who want to optimize their personal machines.
> > 
> > But you're right, it wouldn't be responsible to enable this feature
> > by
> > default in a distro like android or chromium.
> > 
> > > 
> > > For example it would be much safer to enable this for hubs of the
> > > first level and internal devices.
> 
> I disagree. I think it's only safe to do so for devices known to be

If you want absolute safety, yes.
Internal devices however are manufactured approximately at the same
time as the host, so we can hope they are improving with time.
While as for external devices what is out there needs to be supported.

In addition, they are a much smaller group for which we can hope
to get a reasonable testing coverage. A generic white list will always
be a fraction of all possibilities.
And the tests are harder as external devices are likelier to be
depowered during S3.

	Regards
		Oliver

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