Hi All, There is a potential race condition in the Generic Attribute API. I'd like to collect opinions to avoid re-work later. How to reproduce: - call CreateDevice() for a device which exports a GATT based service: CreateDevice will discover all primary services and the Generic API will register the object paths for all found services - Call DiscoverCharacteristics() of the primary service followed by Characteristic GetProperties(), expected result: read all characteristics properties outcome: partial characteristics properties may appear. This problem happens because DiscoverCharacteristics() doesn't wait for all characteristic VALUES, it returns after discovering all characteristic DECLARATIONS. Wait for characteristic values is a problem, attributes may require authentication or authorization. Suggestions are: 1. Report discovered characteristic values using PropertyChanged: Returning empty properties values (for GetProperties) if the discovery is in progress 2. Block GetProperties() if there is a discovery pending: returning after discovery finishes. Timeout can still happen! 3. Return Busy for GetProperties() if there is a characteristic discovery in progress Comments? BR, Claudio -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
