On Wednesday, September 28, 2016 11:55:47 AM Hans Petter Selasky wrote:
> On 09/28/16 11:31, Jan Henrik Sylvester wrote:
> > On 09/28/2016 10:32, Hans Petter Selasky wrote:
> >> Can you compile your kernel with debugging enabled so that we get the
> >> sourcelines in the dump below. Also please include some parts of the
> >
> > The kernel is from the yet-to-be-released 11.0-RELEASE installed by
> > freebsd-update. Now I have extracted kernel-dbg.txz, base-dbg.txz, and
> > lib32-dbg.txz from the 11.0-RELEAESE distribution, but the backtrace
> > still looks similar. Do have have to do anything else to use the debug
> > symbols or do I really have to compile a new kernel?
> >
> Hi,
> Can you try the attached patch. Does it make any difference?
> device_delete_child() will delete devices starting at the leaves, while 
> USB expects parents to be detached first.
> jhb: Any comments?

This is fine, though I feel like we should fix device_delete_child instead
as this has broken several places.  That is, I think device_delete_child
should do the detach first and then delete any dangling grandchildren
after device_detach() of the child.

John Baldwin
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