[PATCH 3/3] blk-mq: fix wait condition for tagset wait completed check

[Sagi Grimberg]

On 28/01/2025 18:34, Daniel Wagner wrote:
> blk_mq_tagset_count_completed_reqs returns the number of completed
> requests. The only user of this function is
> blk_mq_tagset_wait_completed_request which wants to know how many
> request are not yet completed. Thus return the number of in flight
> requests and terminate the wait loop when there is no inflight request.
>
> Fixes: f9934a80f91d ("blk-mq: introduce blk_mq_tagset_wait_completed_request()")

Can you please describe what this patch is fixing? i.e. what is the 
observed bug?
It is not clear (to me) from the patch.