[ofa-general] CM sysfs-related oops on device driver reload

[Sean Hefty]

>OK, the smaller patch below seems to fix things to, so that's what
>I'll merge.  I think the real issue was that I left the code as
>
>	ret = kobject_init_and_add(&cm_dev->dev_obj, &cm_dev_obj_type,
>				   &cm_class.subsys.kobj, "%s", device->name);
>
>without doing kobject_get() on subsys.kobj, which meant on unload, we
>did an extra put of that subsys.kobj, which left the infiniband_cm
>class in a messed-up state.  But there's no reason to do an extra get
>of the parents (kobject_init_and_add() already gets the parent once
>for us), so we can just simplify everything as below:

Thanks for clarifying this to me.

- Sean