[PATCH] nvme: duplicate NQNs check if devices needed

[Keith Busch]

On Mon, Nov 29, 2021 at 07:18:54PM +0800, Liguang Zhang wrote:
> @@ -2587,6 +2587,9 @@ static struct nvme_subsystem *__nvme_find_get_subsystem(const char *subsysnqn)
>  
>  	lockdep_assert_held(&nvme_subsystems_lock);
>  
> +	if (strncmp(subsysnqn, "nqn.", 4))
> +		return NULL;

This seems like an arbitrary way to decide not to check for duplicates.
Shouldn't we just add the NVME_QUIRK_IGNORE_DEV_SUBNQN quirk for the
broken controllers?