From: Chao Leng <lengchao@huawei.com>
To: Sagi Grimberg <sagi@grimberg.me>,
<linux-nvme@lists.infradead.org>, Christoph Hellwig <hch@lst.de>,
Keith Busch <kbusch@kernel.org>,
"Chaitanya Kulkarni" <Chaitanya.Kulkarni@wdc.com>
Subject: Re: [PATCH 2/2] nvme-rdma: Fix possible hang when failing to set io queues
Date: Tue, 16 Mar 2021 09:33:58 +0800 [thread overview]
Message-ID: <269b5028-9ef1-7f56-1334-d89f52d86d0d@huawei.com> (raw)
In-Reply-To: <20210315210427.357584-2-sagi@grimberg.me>
Reviewed-by: Chao Leng <lengchao@huawei.com>
On 2021/3/16 5:04, Sagi Grimberg wrote:
> We only setup io queues for nvme controllers, and it makes
> absolutely no sense to allow a controller (re)connect without
> any I/O queues. If we happen to fail setting the queue count
> for any reason, we should not allow this to be a successful
> reconnect as I/O has no chance in going through. Instead
> just fail and schedule another reconnect.
>
> Reported-by: Chao Leng <lengchao@huawei.com>
> Fixes: 711023071960 ("nvme-rdma: add a NVMe over Fabrics RDMA host driver")
> Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
> ---
> drivers/nvme/host/rdma.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
> index 53ac4d7442ba..eb093ea5ffa1 100644
> --- a/drivers/nvme/host/rdma.c
> +++ b/drivers/nvme/host/rdma.c
> @@ -736,8 +736,11 @@ static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
> return ret;
>
> ctrl->ctrl.queue_count = nr_io_queues + 1;
> - if (ctrl->ctrl.queue_count < 2)
> - return 0;
> + if (ctrl->ctrl.queue_count < 2) {
> + dev_err(ctrl->ctrl.device,
> + "unable to set any I/O queues\n");
> + return -ENOMEM;
> + }
>
> dev_info(ctrl->ctrl.device,
> "creating %d I/O queues.\n", nr_io_queues);
>
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next prev parent reply other threads:[~2021-03-16 1:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 21:04 [PATCH 1/2] nvme-tcp: Fix possible hang when failing to set io queues Sagi Grimberg
2021-03-15 21:04 ` [PATCH 2/2] nvme-rdma: " Sagi Grimberg
2021-03-16 1:33 ` Chao Leng [this message]
2021-03-18 4:35 ` [PATCH 1/2] nvme-tcp: " Christoph Hellwig
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