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

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On Mon, 2017-01-09 at 09:44 +0100, Oliver Neukum wrote:
> On Fri, 2017-01-06 at 16:45 -0800, Todd Brandt wrote:
> > Add a kernel parameter that replaces the USB_RESUME_TIMEOUT
> > and other hardcoded delay numbers with the USB spec minimums.
> 
> Hi,
> 
> the problem with that is that distros cannot use it. It is obviously
> better than nothing but it seems to me that we can do better than an
> all or nothing option here.

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.

Is there a universal way to reliably determine which USB devices are
internal?

> 
> 	Regards
> 		Oliver
> 
> 


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