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Subject: Re: [RFC 5/6] nvme: replace GENHD_FL_UP with GENHD_FL_DISK_ADDED
To:     Luis Chamberlain <mcgrof@kernel.org>, axboe@kernel.dk
Cc:     bvanassche@acm.org, ming.lei@redhat.com, hch@infradead.org,
        jack@suse.cz, osandov@fb.com, linux-block@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20210715202341.2016612-1-mcgrof@kernel.org>
 <20210715202341.2016612-6-mcgrof@kernel.org>
From:   Hannes Reinecke <hare@suse.de>
Message-ID: <e9212eb9-269c-47d1-60d8-f5282ad5c441@suse.de>
Date:   Fri, 16 Jul 2021 07:53:15 +0200
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On 7/15/21 10:23 PM, Luis Chamberlain wrote:
> The GENHD_FL_DISK_ADDED flag is what we really want, as the
> flag GENHD_FL_UP could be set on a semi-initialized device.
> 
> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
> ---
>   drivers/nvme/host/core.c      | 4 ++--
>   drivers/nvme/host/multipath.c | 2 +-
>   2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 11779be42186..3848353fba11 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -1819,7 +1819,7 @@ static void nvme_update_disk_info(struct gendisk *disk,
>   static inline bool nvme_first_scan(struct gendisk *disk)
>   {
>   	/* nvme_alloc_ns() scans the disk prior to adding it */
> -	return !(disk->flags & GENHD_FL_UP);
> +	return !(disk->flags & GENHD_FL_DISK_ADDED);
>   }
>   
>   static void nvme_set_chunk_sectors(struct nvme_ns *ns, struct nvme_id_ns *id)
> @@ -3823,7 +3823,7 @@ static void nvme_ns_remove(struct nvme_ns *ns)
>   	nvme_mpath_clear_current_path(ns);
>   	synchronize_srcu(&ns->head->srcu); /* wait for concurrent submissions */
>   
> -	if (ns->disk->flags & GENHD_FL_UP) {
> +	if (ns->disk->flags & GENHD_FL_DISK_ADDED) {
>   		if (!nvme_ns_head_multipath(ns->head))
>   			nvme_cdev_del(&ns->cdev, &ns->cdev_device);
>   		del_gendisk(ns->disk);
> diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
> index 0ea5298469c3..8048678969ba 100644
> --- a/drivers/nvme/host/multipath.c
> +++ b/drivers/nvme/host/multipath.c
> @@ -764,7 +764,7 @@ void nvme_mpath_remove_disk(struct nvme_ns_head *head)
>   {
>   	if (!head->disk)
>   		return;
> -	if (head->disk->flags & GENHD_FL_UP) {
> +	if (head->disk->flags & GENHD_FL_DISK_ADDED) {
>   		nvme_cdev_del(&head->cdev, &head->cdev_device);
>   		del_gendisk(head->disk);
>   	}
> 
Same here: please use the wrapper.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@suse.de                              +49 911 74053 688
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