Re: [PATCH v5] blk-mq: Avoid that a completion can be ignored for BLK_EH_RESET_TIMER

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On Tue, Apr 10, 2018 at 03:01:57PM -0600, Bart Van Assche wrote:
> The blk-mq timeout handling code ignores completions that occur after
> blk_mq_check_expired() has been called and before blk_mq_rq_timed_out()
> has reset rq->aborted_gstate. If a block driver timeout handler always
> returns BLK_EH_RESET_TIMER then the result will be that the request
> never terminates.

Under this situation:

IMO, if this request has been handled by driver's irq handler, and if
driver's .timeout still returns BLK_EH_RESET_TIMER, it is driver's bug,
and the correct return value should be BLK_EH_HANDLED.

-- 
Ming



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