netdev - Re: [Patch v7 5/5] RDMA/mana

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Message-ID: <20231023182332.GL691768@ziepe.ca>
Date: Mon, 23 Oct 2023 15:23:32 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: sharmaajay@...uxonhyperv.com
Cc: Long Li <longli@...rosoft.com>, Leon Romanovsky <leon@...nel.org>,
	Dexuan Cui <decui@...rosoft.com>, Wei Liu <wei.liu@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-rdma@...r.kernel.org, linux-hyperv@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ajay Sharma <sharmaajay@...rosoft.com>
Subject: Re: [Patch v7 5/5] RDMA/mana_ib: Send event to qp

On Mon, Oct 16, 2023 at 03:12:02PM -0700, sharmaajay@...uxonhyperv.com wrote:

> diff --git a/drivers/infiniband/hw/mana/qp.c b/drivers/infiniband/hw/mana/qp.c
> index ef3275ac92a0..19fae28985c3 100644
> --- a/drivers/infiniband/hw/mana/qp.c
> +++ b/drivers/infiniband/hw/mana/qp.c
> @@ -210,6 +210,8 @@ static int mana_ib_create_qp_rss(struct ib_qp *ibqp, struct ib_pd *pd,
>  		wq->id = wq_spec.queue_index;
>  		cq->id = cq_spec.queue_index;
>  
> +		xa_store(&mib_dev->rq_to_qp_lookup_table, wq->id, qp, GFP_KERNEL);
> +

A store with no erase?

A load with no locking?

This can't be right

Jason