Messages in this thread | | | Date | Fri, 10 Aug 2018 10:19:30 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [PATCH] usb: hub: try old enumeration scheme first for high speed devices |
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On Fri, 10 Aug 2018, Roger Quadros wrote:
> Hi, > > On 10/08/18 18:01, Zeng Tao wrote: > > The new scheme is required just to support legacy low and full-speed > > devices. For high speed devices, it will slower the enumeration speed. > > So in this patch we try the "old" enumeration scheme first for high speed > > devices. > > How slow does it get? Is it significant? > Do we risk breaking existing HS devices that work? I don't think we can > be sure till we run this through testing.
Indeed. I am extremely skeptical about a patch like this, unless somebody can show that Windows uses the "old" scheme for high-speed devices.
Alan Stern
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