[PATCH 1/2] nvme: keep transport module referenced while head node is open

[Keith Busch]

On Mon, Aug 31, 2026 at 08:49:54PM +0530, Nilay Shroff wrote:
> +static inline int nvme_module_get(struct nvme_ns *ns, unsigned int count)
> +{
> +	unsigned int i;
> +
> +	for (i = 0; i < count; i++) {
> +		if (!try_module_get(ns->ctrl->ops->module))
> +			goto out_unwind;
> +	}
> +
> +	return 0;
> +out_unwind:
> +	while (i--)
> +		module_put(ns->ctrl->ops->module);
> +	return -ENXIO;
> +}
> +
> +static inline void nvme_module_put(struct nvme_ns *ns, unsigned int count)
> +{
> +	while (count--)
> +		module_put(ns->ctrl->ops->module);
> +}

Thanks, looks correct to me.

I don't like the looping though. This could be done in a single
atomic_sub instead of multiple atomic_dec calls if the module api
provided something to get/put many references.