Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH] nvme-fc: Only call nvme_cleanup_cmd() for normal
 operations
To:     Daniel Wagner <dwagner@suse.de>, linux-nvme@lists.infradead.org
Cc:     linux-kernel@vger.kernel.org, Keith Busch <kbusch@kernel.org>,
        Max Gurtovoy <maxg@mellanox.com>
References: <20200529113740.31269-1-dwagner@suse.de>
From:   James Smart <james.smart@broadcom.com>
Message-ID: <673ed6fc-e0fd-db71-67e5-b0d5e6007397@broadcom.com>
Date:   Tue, 2 Jun 2020 09:30:24 -0700
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
 Thunderbird/68.8.1
MIME-Version: 1.0
In-Reply-To: <20200529113740.31269-1-dwagner@suse.de>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
Content-Language: en-US
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


On 5/29/2020 4:37 AM, Daniel Wagner wrote:
> Asynchronous event notifications do not have an request
> associated. When fcp_io() fails we unconditionally call
> nvme_cleanup_cmd() which leads to a crash.
>
> Fixes: 16686f3a6c3c ("nvme: move common call to nvme_cleanup_cmd to core layer")
> Cc: Max Gurtovoy <maxg@mellanox.com>
> Signed-off-by: Daniel Wagner <dwagner@suse.de>
> ---
>   drivers/nvme/host/fc.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
> index 7dfc4a2ecf1e..287a3e8ea317 100644
> --- a/drivers/nvme/host/fc.c
> +++ b/drivers/nvme/host/fc.c
> @@ -2300,10 +2300,11 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
>   		opstate = atomic_xchg(&op->state, FCPOP_STATE_COMPLETE);
>   		__nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate);
>   
> -		if (!(op->flags & FCOP_FLAGS_AEN))
> +		if (!(op->flags & FCOP_FLAGS_AEN)) {
>   			nvme_fc_unmap_data(ctrl, op->rq, op);
> +			nvme_cleanup_cmd(op->rq);
> +		}
>   
> -		nvme_cleanup_cmd(op->rq);
>   		nvme_fc_ctrl_put(ctrl);
>   
>   		if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE &&

Reviewed-by:  James Smart  <james.smart@broadcom.com>

-- james