On Fri, Oct 19, 2012 at 8:02 PM, Greg KH [off-list ref] wrote:

We used to have problems with attributes removing/adding devices or
attributes from their callbacks, but that has been fixed up now, and the
fact that the other gpio code works this way is good enough precedence
to keep me from objecting to it.

OK thanks I get this now too...

Yours,
Linus Walleij