When I unplug my USB device, my driver is being cleaned up properly, but the
IOAudioEngine it creates is left hanging around with a retain count of 5.
It is never freed.
IOAudioEngine::stop() is being called. All the user clients (e.g. Controls
and IOAudioEngineUserClient) are being terminated and freed.
The retain counting in the driver is correct - its modeled after the
SamplePCIAudioDriver. There's no obvious problem in the driver.
It feels like HAL or someone else in user land is retaining the
IOAudioEngine and not releasing it.
Is there anything special you have to do to tell HAL a device has gone away?
Has anyone else seen this before?
Thanks!
Cameron Jones
Salem Technology Associates
--
Cameron W. Jones
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