When after_configure() for a request fails, then the request is not removed from the queue at that time, and the link enters to failed state. After that, if the link is reconfigured or its carrier is lost, then the request is dropped from the queue, and the message_counter is decreased. However, the counter is already or will be also decreased when the corresponding netlink reply is received. So, the counter is decreased twice.
System and Service Manager
Details
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