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When I submitted the extcon handling I had a patch pending for the extcon sub-system for extcon_register_notifier to take -1 as cable id for listening for all type cable events on an extcon with a single notifier. In the end it was decided to instead add a new extcon_register_notifier_all function for this, switch to using this. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Liam Breck <kernel@networkimprov.net> Signed-off-by: Sebastian Reichel <sre@kernel.org>