Subject: Re: linux-next: manual merge of the block tree with Linus' tree

From: Stephen Rothwell <[email-masked]>
Date: Fri, 22 Jan 2016 09:46:01 +1100

Hi Jens,

On Thu, 31 Dec 2015 14:34:57 +1100 Stephen Rothwell <[email-masked]> wrote:
>
> Today's linux-next merge of the block tree got a conflict in:
> 
>   drivers/nvme/host/pci.c
> 
> between commit:
> 
>   b5875222de2f ("NVMe: IO ending fixes on surprise removal")
> 
> from Linus' tree and commit:
> 
>   5bae7f73d378 ("nvme: move namespace scanning to common code")
> 
> from the block tree.
> 
> I fixed it up (the code was moved - I added the fix patch below) and
> can carry the fix as necessary (no action is required).
> 
> However, there was another part to the former patch that I could not
> quite figure out how to reproduce - the fix to nvme_dev_remove().
> 
> From: Stephen Rothwell <[email-masked]>
> Date: Thu, 31 Dec 2015 14:21:38 +1100
> Subject: [PATCH] nvme: merge fix up for ns code movement
> 
> Signed-off-by: Stephen Rothwell <[email-masked]>
> ---
>  drivers/nvme/host/core.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 1437ff36e91c..1375a83593b5 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -1118,8 +1118,17 @@ static void nvme_ns_remove(struct nvme_ns *ns)
>  	bool kill = nvme_io_incapable(ns->ctrl) &&
>  			!blk_queue_dying(ns->queue);
>  
> -	if (kill)
> +	if (kill) {
>  		blk_set_queue_dying(ns->queue);
> +
> +		/*
> +		 * The controller was shutdown first if we got here through
> +		 * device removal. The shutdown may requeue outstanding
> +		 * requests. These need to be aborted immediately so
> +		 * del_gendisk doesn't block indefinitely for their completion.
> +		 */
> +		blk_mq_abort_requeue_list(ns->queue);
> +	}
>  	if (ns->disk->flags & GENHD_FL_UP) {
>  		if (blk_get_integrity(ns->disk))
>  			blk_integrity_unregister(ns->disk);
> -- 
> 2.6.4

So, I have been applying the above merge fix patch since Dec 31 and now
wonder if Linus needs to be told about it.  Also noone every replied
about the nvme_dev_remove() part.

-- 
Cheers,
Stephen Rothwell                    [email-masked]