Re: [PATCH] Re: [linux-usb-devel] Re: [OOPS] reproducible oops with2.6.5-rc2-bk3

From: Alan Stern
Date: Thu Mar 25 2004 - 13:49:47 EST

On Thu, 25 Mar 2004, Colin Leroy wrote:

> Hi,
> Found out !
> cdc-acm wants both interfaces to be ready (cur_altsetting initialized) when acm_probe() is called. Hence, we have to make two parts out of the loop in message.c::usb_set_configuration(): one to init things, one to register them.
> The attached patch does that. It fixes the oops, and doesn't break any of my USB peripheral (printer, scanner, mouse, and diskonkey).
> I hope it's fine enough to go in :)

It's obvious once you see the problem, isn't it?

Duncan Sands found exactly the same problem and the same solution a few
months ago, but it was never added in.

In this case, your patch could be improved by calling device_initialize()
during the first loop and device_add() during the second. However, that
region of code is kind of in flux right at the moment. When things settle
down, I promise to remember your change and make sure it gets in.

Alan Stern

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