[haiku-commits] Re: r41658 - haiku/trunk/src/add-ons/kernel/busses/usb
- From: Jérôme Duval <korli@xxxxxxxxxxxxxxxx>
- To: haiku-commits@xxxxxxxxxxxxx
- Date: Sun, 22 May 2011 22:39:29 +0200
2011/5/22 Axel Dörfler <axeld@xxxxxxxxxxxxxxxx>:
> korli@xxxxxxxxxxxxxxxx wrote:
>> * 250ms is too long: USB 2.0 specifies only 50ms. This prevented one
>> of my devices to > be detected.
>
> AFAIK, timeouts are tricky with USB, and following the specs does not
> always yield to the desired results.
> Since EHCI mostly works, I am not sure if pushing this to the alpha is
> a good idea before giving it a broader testing.
In this case, not following the spec yields non working devices: a
USB1.1 ethernet device wasn't working on a specific port, a USB3.0
hard disk wasn't working on a USB2.0 port. As of other OS, FreeBSD
exactly follows the spec and Linux uses a quite lower value.
Bye,
Jérôme
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