[PATCH AUTOSEL 4.14 29/73] block, bfq: correctly charge and reset entity service in all cases

From: Paolo Valente [ Upstream commit cbeb869a3d1110450186b738199963c5e68c2a71 ] BFQ schedules entities (which represent either per-process queues or groups of queues) as a function of their timestamps. In particular, as a function of their (virtual) finish times. The finish time of an entity

[PATCH AUTOSEL 4.14 29/73] block, bfq: correctly charge and reset entity service in all cases

From: Paolo Valente [ Upstream commit cbeb869a3d1110450186b738199963c5e68c2a71 ] BFQ schedules entities (which represent either per-process queues or groups of queues) as a function of their timestamps. In particular, as a function of their (virtual) finish times. The finish time of an entity