On 2020-04-10 23:01, Dexuan Cui wrote: > Please let me know if the change to scsi_device_set_state() is OK. Hadn't Ming Lei already root-caused this issue for you? From his e-mail: "So you can't free related vmbus ringbuffer cause BLK_MQ_REQ_PREEMPT request is still to be handled." Please follow that advice. Thanks, Bart.