On Tuesday 29 July 2008, Benjamin Herrenschmidt wrote:

On Tue, 2008-07-29 at 14:17 +0900, FUJITA Tomonori wrote:

quoted

If q->elevator is NULL, the media-bay code might mess up the ref
counting of the request queue...

Well, all I do is call into Bart's new helpers to scan for or unregister
devices ...

The switch to these helpers happened _before_ 2.6.26 and it shouldn't bring
such behavior change (ditto for new IDE host addition/removal helpers)...

Please try to git-bisect it when you have some time.

Thanks,
Bart