Alan Stern wrote:

So both ports have their overcurrent inputs wired
> and you can't use any USB devices at all?

Correct

Given that there aren't any USB ports available,
> you wouldn't normally load the uhci-hcd module in the
first place, right?

A standard distribution like RedHat will load the module by default because the USB controller is present. There is no way for the installation code to determine that the controller is hardwired OC.

This was a problem when the OC issue originally came up
because the ISR was spinning for multiple milliseconds,
causing interrupt latency problems for other devices.
You have since modified the USB driver so that it
does not spin in the ISR.

Why do you think you get all those "irq status" messages?  The controller
should have sent only one interrupt request.  Is there another device on
the system sharing the same IRQ line?

Possible, I'll check.


Also, why isn't there a log message showing the controller being suspended? The patch should have caused that to happen after 1 second. In fact it _must_ have happened, otherwise there wouldn't be any "resume status" messages.

I don't know, I just copied and pasted from the system log.


Now I'm thinking it would be better to go ahead and suspend, and then
avoid resuming when no ports are connected.

Reasonable.


The potential problem is that if only one port is hardwired OC then we risk missing a RD from a device being plugged in to the other port. That's what I really wanted to test, but your machine can't do it.

Yup. Aitch-Pee technology at its best.


I'll let you know in a bit about the possible IRQ sharing.

--
Paul Fulghum
[EMAIL PROTECTED]



-------------------------------------------------------
SF.Net is sponsored by: Speed Start Your Linux Apps Now.
Build and deploy apps & Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel

Reply via email to