Re: usb_id segfaulting on 2.6.23

[Daniel Drake <dsd@gentoo.org>]

Sorry for the delayed response. I was away from this computer for a 
while, and I wanted to get a decent amount of info before we continue.

Kay Sievers wrote:
> Strange, seems some attributes are not catched by udev. What does
> "udevinfo" print for the working setup? Do you see the missing
> attributes there?

You're referring to idVendor, idProduct, etc. Actually, those attributes 
don't even exist in sysfs(!!) which must be the root of the problem.

So, I bisected the kernel. Ready for a strange result?
First bad commit is 296699de: Introduce CONFIG_SUSPEND for 
suspend-to-Ram and standby

On this system, I always disable suspend/hibernate/etc support, and 
continued to do so throughout the bisection. This lead me to the above 
result.

On a kernel tree with HEAD as 296699de, I see the bug (no idVendor, etc) 
when CONFIG_SUSPEND=n (my normal setup). However, if I set 
CONFIG_SUSPEND=y, the missing USB sysfs attributes show up!

On 2.6.24-rc1-git14, the same is true. CONFIG_SUSPEND=n, no idVendor 
nodes, udev usb_id crashes on boot. CONFIG_SUSPEND=y, idVendor and 
friends are back, udev behaves as normal.

I know you have experience working with sysfs/kobject internals, do you 
have any suggestions or thoughts before I take this to LKML?

Thanks!
Daniel

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