Re: [PATCH v3 05/16] nvmet-fcloop: Remove remote port from list when unlinking

[Hannes Reinecke]

On 12/18/23 16:30, Daniel Wagner wrote:
> The remote port is removed too late from fcloop_nports list. Remove it
> when port is unregistered.
>
> This prevents a busy loop in fcloop_exit, because it is possible the
> remote port is found in the list and thus we will never progress.
>
> The kernel log will be spammed with
>
>    nvme_fcloop: fcloop_exit: Failed deleting remote port
>    nvme_fcloop: fcloop_exit: Failed deleting target port
>
> Signed-off-by: Daniel Wagner <dwagner@xxxxxxx>
> ---
>   drivers/nvme/target/fcloop.c | 7 ++-----
>   1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/nvme/target/fcloop.c b/drivers/nvme/target/fcloop.c
> index c65a73433c05..ead349af30f1 100644
> --- a/drivers/nvme/target/fcloop.c
> +++ b/drivers/nvme/target/fcloop.c
> @@ -995,11 +995,6 @@ fcloop_nport_free(struct kref *ref)
>   {
>   	struct fcloop_nport *nport =
>   		container_of(ref, struct fcloop_nport, ref);
> -	unsigned long flags;
> -
> -	spin_lock_irqsave(&fcloop_lock, flags);
> -	list_del(&nport->nport_list);
> -	spin_unlock_irqrestore(&fcloop_lock, flags);
>   
>   	kfree(nport);
>   }
> @@ -1357,6 +1352,8 @@ __unlink_remote_port(struct fcloop_nport *nport)
>   		nport->tport->remoteport = NULL;
>   	nport->rport = NULL;
>   
> +	list_del(&nport->nport_list);
> +
>   	return rport;
>   }
>   
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>

Cheers,

Hannes
--
Dr. Hannes Reinecke                Kernel Storage Architect
hare@xxxxxxx                              +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), GF: Ivo Totev, Andrew McDonald,
Werner Knoblich