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device_tracker.ubus: Handle devices not running DHCP (#13579)
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@ -103,6 +103,9 @@ class UbusDeviceScanner(DeviceScanner):
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"""Return the name of the given device or None if we don't know."""
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if self.mac2name is None:
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self._generate_mac2name()
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if self.mac2name is None:
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# Generation of mac2name dictionary failed
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return None
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name = self.mac2name.get(device.upper(), None)
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return name
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