nvme/nda: Fail all nvme I/Os after controller fails

[imp]

Summary

Once the controller has failed, fail all I/O w/o sending it to the
device. The reset of the nvme driver won't schedule any I/O to the
failed device, and the controller is in an indeterminate state and can't
accept I/O. Fail both at the top end of the sim and the bottom
end. Don't bother queueing up the I/O for failure in a different task.

Sponsored by: Netflix

[chuck]

sys/dev/nvme/nvme_qpair.c

1094

Should this comment get updated as nvme_qpair_manual_complete_request() isn't posting to a task?

sys/dev/nvme/nvme_sim.c

262

I'm not seeing a definition for CAM_REQ_DEV_NOT_THERE. Should this be CAM_DEV_NOT_THERE?

[imp]

update per review / chuck

[mav]

sys/dev/nvme/nvme_sim.c

264

It is not a problem, but is it really needed?