[PATCH] nvme-multipath: set nr_zones for zoned namespaces

[Damien Le Moal]

On 2021/02/06 4:50, Keith Busch wrote:
> The bio based drivers only require the request_queue's nr_zones is set,
> so set this field in the head if the namespace path is zoned.
> 
> Reported-by: Minwoo Im <minwoo.im.dev at gmail.com>
> Cc: Damien Le Moal <damien.lemoal at wdc.com>
> Signed-off-by: Keith Busch <kbusch at kernel.org>

Shouldn't this have a Fixes tag ?

> ---
>  drivers/nvme/host/multipath.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
> index 1427c9555cef..a1d476e1ac02 100644
> --- a/drivers/nvme/host/multipath.c
> +++ b/drivers/nvme/host/multipath.c
> @@ -677,6 +677,10 @@ void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id)
>  	if (blk_queue_stable_writes(ns->queue) && ns->head->disk)
>  		blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES,
>  				   ns->head->disk->queue);
> +#ifdef CONFIG_BLK_DEV_ZONED
> +	if (blk_queue_is_zoned(ns->queue) && ns->head->disk)
> +		ns->head->disk->queue->nr_zones = ns->queue->nr_zones;
> +#endif

Is the zone model set already ? I have not checked...

>  }
>  
>  void nvme_mpath_remove_disk(struct nvme_ns_head *head)
> 


-- 
Damien Le Moal
Western Digital Research