[PATCH rfc 28/30] nvme: update tagset nr_hw_queues when reallocating io queues

[Christoph Hellwig]

On Sun, Jun 18, 2017 at 06:22:02PM +0300, Sagi Grimberg wrote:
> Signed-off-by: Sagi Grimberg <sagi at grimberg.me>

Could use a changelog.

Ming: does this solve your problem of not seeing the new queues
after a qemu CPU hotplug + reset?

> ---
>  drivers/nvme/host/core.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 6937ba26ff2c..476c49c0601f 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -2776,6 +2776,9 @@ int nvme_configure_io_queues(struct nvme_ctrl *ctrl, bool new)
>  		ret = blk_mq_reinit_tagset(ctrl->tagset);
>  		if (ret)
>  			goto out_free_io_queues;
> +
> +		blk_mq_update_nr_hw_queues(ctrl->tagset,
> +				ctrl->queue_count - 1);
>         }
>  
>  	ret = nvme_start_io_queues(ctrl);
> -- 
> 2.7.4
---end quoted text---