EHCI considered harmful?

Andre Guibert de Bruet andy at siliconlandmark.com
Fri Oct 29 03:27:00 PDT 2004


On Fri, 29 Oct 2004, Thomas E. Zander wrote:

> On Fri, 29. Oct 2004, at  1:08 -0700, Bruce M Simpson wrote
> according to [Re: EHCI considered harmful?]:
>
>> ehci(4) is not stable code and fails reproducibly with my ALi-based
>> USB2 disk enclosure.
>
> Well, okay then. I was just wondering because it doesn't appear on
> Scott's todo-list for 5.3-R and it seems to accidently work on my
> box :-)

This is my understanding of the current state of our USB ehci support: 
ehci only works with certain chipsets. On the ones that it does work with, 
you do not want to have a USB2 hub connected (With ehci in your config) as 
it will not be supported. Removing ehci from your kernel lets you use a 
USB2 hub in 1.1 mode.

Andy

| Andre Guibert de Bruet | Enterprise Software Consultant >
| Silicon Landmark, LLC. | http://siliconlandmark.com/    >


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