Re: pl2303 ttyUSB0: pl2303_open - failed submitting interrupt urb, error -28

[Mark Lord <lkml@rtr.ca>]

Greg KH wrote:
..
> It's a flaky thing.

No kidding.  Okay, it is also now failing for me with 2.6.16.18.

BUT.. with exactly that same binary kernel, it worked fine
not long ago --> but I've swapped out userland since then,
upgrading from Breezy to Dapper.  So something userland in Dapper
is triggering this failure, in a way that Breezy never did before.

This device has been quite usable until now (the upgrade to Dapper).

> Known issue for years.  Either plug it directly into the USB 2.0 root
> hub, or disable the ehci driver.

MMm.. yes, that makes some sense.  I have a pl2303 standalone that works fine,
but the one integrated into the 1.1 hub/dock is the one that fails.

If I plug the 1.1 hub/dock into another external hub, no problems.

> Also, look in the -mm tree, there is a fix for this direct error, and
> hopefully some ehci fixes that enable the whole thing to work properly.

Okay, I'll hunt for that.  Do you know of the exact patch?

Thanks