Re: [PATCH 4/8] nvme: implement mq_ops->commit_rqs() hook

[Christoph Hellwig]

> +static inline int nvme_next_ring_index(struct nvme_queue *nvmeq, u16 index)
> +{
> +     if (++index == nvmeq->q_depth)
> +             return 0;
> +
> +     return index;

Can you please just drop this helper?  It makes the code not only
less readable but also longer.

Otherwise the change looks fine to me.