Fix return from repart stage #2864
Merged
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If we return from the repart stage it's important to wait for the root device to appear. This is because the device setup from udev might still be held back due to a former lock on the device. This means if we return fast after locking for example when check_repart_possible() quickly finds out that it's not possible, then udev has not yet got the time to create the device nodes.
This Fixes #2863