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From: Hannes Reinecke <hare@suse.de>
To: Luis Chamberlain <mcgrof@kernel.org>,
	axboe@kernel.dk, martin.petersen@oracle.com, jejb@linux.ibm.com,
	kbusch@kernel.org, sagi@grimberg.me, adrian.hunter@intel.com,
	beanhuo@micron.com, ulf.hansson@linaro.org, avri.altman@wdc.com,
	swboyd@chromium.org, agk@redhat.com, snitzer@redhat.com,
	josef@toxicpanda.com
Cc: linux-block@vger.kernel.org, bvanassche@acm.org,
	linux-scsi@vger.kernel.org, linux-mmc@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org,
	ming.lei@redhat.com, hch@infradead.org, dm-devel@redhat.com,
	nbd@other.debian.org, Christoph Hellwig <hch@lst.de>
Subject: Re: [dm-devel] [PATCH v3 3/8] nvme: add error handling support for add_disk()
Date: Mon, 6 Sep 2021 08:16:35 +0200	[thread overview]
Message-ID: <677ca876-b003-d3b5-9e2e-d50ebef82cce@suse.de> (raw)
In-Reply-To: <20210830212538.148729-4-mcgrof@kernel.org>

On 8/30/21 11:25 PM, Luis Chamberlain wrote:
> We never checked for errors on add_disk() as this function
> returned void. Now that this is fixed, use the shiny new
> error handling.
> 
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
> ---
>   drivers/nvme/host/core.c | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 8679a108f571..687d3be563a3 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -3763,7 +3763,9 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid,
>   
>   	nvme_get_ctrl(ctrl);
>   
> -	device_add_disk(ctrl->device, ns->disk, nvme_ns_id_attr_groups);
> +	if (device_add_disk(ctrl->device, ns->disk, nvme_ns_id_attr_groups))
> +		goto out_cleanup_ns_from_list;
> +
>   	if (!nvme_ns_head_multipath(ns->head))
>   		nvme_add_ns_cdev(ns);
>   
> @@ -3773,6 +3775,11 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid,
>   
>   	return;
>   
> + out_cleanup_ns_from_list:
> +	nvme_put_ctrl(ctrl);
> +	down_write(&ctrl->namespaces_rwsem);
> +	list_del_init(&ns->list);
> +	up_write(&ctrl->namespaces_rwsem);
>    out_unlink_ns:
>   	mutex_lock(&ctrl->subsys->lock);
>   	list_del_rcu(&ns->siblings);
> 
I would rather turn this around, and call 'nvme_put_ctrl()' after 
removing the namespace from the list. But it's probably more a style 
issue, come to think of it.

Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@suse.de                              +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer


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  reply	other threads:[~2021-09-06  6:17 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-30 21:25 [dm-devel] [PATCH v3 0/8] block: first batch of add_disk() error handling conversions Luis Chamberlain
2021-08-30 21:25 ` [dm-devel] [PATCH v3 1/8] scsi/sd: add error handling support for add_disk() Luis Chamberlain
2021-09-06  6:13   ` Hannes Reinecke
2021-09-07  1:29   ` Ming Lei
2021-09-13 17:21     ` Luis Chamberlain
2021-08-30 21:25 ` [dm-devel] [PATCH v3 2/8] scsi/sr: " Luis Chamberlain
2021-09-06  6:13   ` Hannes Reinecke
2021-09-07  1:37   ` Ming Lei
2021-09-13 17:26     ` Luis Chamberlain
2021-08-30 21:25 ` [dm-devel] [PATCH v3 3/8] nvme: " Luis Chamberlain
2021-09-06  6:16   ` Hannes Reinecke [this message]
2021-09-06  8:09     ` Christoph Hellwig
2021-09-06  8:09   ` Christoph Hellwig
2021-08-30 21:25 ` [dm-devel] [PATCH v3 4/8] mmc/core/block: " Luis Chamberlain
2021-09-06 17:10   ` Ulf Hansson
2021-08-30 21:25 ` [dm-devel] [PATCH v3 5/8] md: " Luis Chamberlain
2021-09-06  6:17   ` Hannes Reinecke
2021-08-30 21:25 ` [dm-devel] [PATCH v3 6/8] dm: add add_disk() error handling Luis Chamberlain
2021-09-06  6:19   ` Hannes Reinecke
2021-08-30 21:25 ` [dm-devel] [PATCH v3 7/8] loop: add error handling support for add_disk() Luis Chamberlain
2021-09-06  6:19   ` Hannes Reinecke
2021-08-30 21:25 ` [dm-devel] [PATCH v3 8/8] nbd: " Luis Chamberlain
2021-09-06  6:20   ` Hannes Reinecke

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