linux-kernel - Re: [PATCH blktests v2 1/2] nvme-rc: Cleanup fc ports in reverse order

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Date:   Wed, 19 Apr 2023 12:41:10 +0300
From:   Sagi Grimberg <sagi@...mberg.me>
To:     Daniel Wagner <dwagner@...e.de>, linux-nvme@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        Chaitanya Kulkarni <kch@...dia.com>,
        Shin'ichiro Kawasaki <shinichiro@...tmail.com>
Subject: Re: [PATCH blktests v2 1/2] nvme-rc: Cleanup fc ports in reverse
 order



On 4/19/23 11:47, Daniel Wagner wrote:
> We need to free the resources in the opposite order as we allocate them.
> 
> Signed-off-by: Daniel Wagner <dwagner@...e.de>
> ---
>   tests/nvme/rc | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tests/nvme/rc b/tests/nvme/rc
> index b44239446dcf..ec0cc2d8d8cc 100644
> --- a/tests/nvme/rc
> +++ b/tests/nvme/rc
> @@ -204,10 +204,10 @@ _cleanup_fcloop() {
>   	local remote_wwnn="${3:-$def_remote_wwnn}"
>   	local remote_wwpn="${4:-$def_remote_wwpn}"
>   
> -	_nvme_fcloop_del_rport "${local_wwnn}" "${local_wwpn}" \
> -			       "${remote_wwnn}" "${remote_wwpn}"
>   	_nvme_fcloop_del_tport "${remote_wwnn}" "${remote_wwpn}"
>   	_nvme_fcloop_del_lport "${local_wwnn}" "${local_wwpn}"
> +	_nvme_fcloop_del_rport "${local_wwnn}" "${local_wwpn}" \
> +			       "${remote_wwnn}" "${remote_wwpn}"
>   }
>   
>   _cleanup_nvmet() {

Does this fix a bug? if it does, than it should probably be documented
that there is a driver bug because userspace teardown ordering should
not trigger a driver bug.