[PATCH] nvme-multipath: set QUEUE_FLAG_NOWAIT

[Sagi Grimberg]

> The nvme multipathing code just dispatches bios to one of the blk-mq
> based paths and never blocks on its own, so set QUEUE_FLAG_NOWAIT
> to support REQ_NOWAIT bios.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>   drivers/nvme/host/multipath.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
> index d390f14b8bb6..c77dfe28df67 100644
> --- a/drivers/nvme/host/multipath.c
> +++ b/drivers/nvme/host/multipath.c
> @@ -480,6 +480,8 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head)
>   			ctrl->subsys->instance, head->instance);
>   
>   	blk_queue_flag_set(QUEUE_FLAG_NONROT, head->disk->queue);
> +	blk_queue_flag_set(QUEUE_FLAG_NOWAIT, head->disk->queue);
> +
>   	/* set to a default value of 512 until the disk is validated */
>   	blk_queue_logical_block_size(head->disk->queue, 512);
>   	blk_set_stacking_limits(&head->disk->queue->limits);
> 

Reviewed-by: Sagi Grimberg <sagi at grimberg.me>