eis: keep our eis_devices in a list
This allows us to suspend/resume the devices as needed but more importantly, it also means we definitely have a ref to the device until we no longer need it.
Sits on top of !6 (merged)
cc @ofourdan
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This allows us to suspend/resume the devices as needed but more importantly, it also means we definitely have a ref to the device until we no longer need it.
Sits on top of !6 (merged)
cc @ofourdan