Re: kern/46696: uhub disables port where USB keyboard attached

[Matthias Drochner <m.drochner%googlemail.com@localhost>]

The following reply was made to PR kern/46696; it has been noted by GNATS.

From: Matthias Drochner <m.drochner%googlemail.com@localhost>
To: 
Cc: Andreas Gustafsson <gson%gson.org@localhost>, 
<gnats-bugs%netbsd.org@localhost>,
 <mishka%NetBSD.org@localhost>
Subject: Re: kern/46696: uhub disables port where USB keyboard attached
Date: Sat, 22 Sep 2012 14:28:54 +0200

 On Tue, 18 Sep 2012 09:53:41 +0200
 Matthias Drochner <m.drochner%gmail.com@localhost> wrote:
 > It is also strange that it hands over the device to USB1 at all,
 > should better stay on ehci... Need to check specs for compatibility
 > requirements.
 
 I've identified the problem. Out reset is too long. It collides
 with a timeout in the USB3 spec.
 
 > > Matthias, can you identify the USB device that prompted the above
 > > commit?  And if it is a full-speed device, would it be possible
 > > to use the 64-byte request size for full-speed devices but not
 > > low-speed ones?
 > 
 > I'm not 100% sure. Probably some Atmel-based embedded design.
 > This is most certainly a full speed one, so it is better to
 > restrict the effect of your patch to low-speed.
 
 Here is a citation which confirms what I said about the 64-byte
 request:
 http://www.usbmadesimple.co.uk/ums_4.htm
 
 best regards
 Matthias