linux-kernel - Re: [PATCH] RDMA/ib_srpt: unify checking rdma_cm_id condition in srpt_cm_req

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Date:   Mon, 1 Aug 2022 09:46:07 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Li Zhijian <lizhijian@...itsu.com>, Jason Gunthorpe <jgg@...pe.ca>,
        Leon Romanovsky <leon@...nel.org>, linux-rdma@...r.kernel.org,
        target-devel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] RDMA/ib_srpt: unify checking rdma_cm_id condition in
 srpt_cm_req_recv()

On 7/31/22 23:43, Li Zhijian wrote:
> Although rdma_cm_id and ib_cm_id passing to srpt_cm_req_recv() are
> exclusive currently, all other checking condition are using rdma_cm_id.
> So unify the 'if' condition to make the code more clear.
> 
> Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
> ---
>   drivers/infiniband/ulp/srpt/ib_srpt.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
> index c3036aeac89e..21cbe30d526f 100644
> --- a/drivers/infiniband/ulp/srpt/ib_srpt.c
> +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
> @@ -2218,13 +2218,13 @@ static int srpt_cm_req_recv(struct srpt_device *const sdev,
>   	ch->zw_cqe.done = srpt_zerolength_write_done;
>   	INIT_WORK(&ch->release_work, srpt_release_channel_work);
>   	ch->sport = sport;
> -	if (ib_cm_id) {
> -		ch->ib_cm.cm_id = ib_cm_id;
> -		ib_cm_id->context = ch;
> -	} else {
> +	if (rdma_cm_id) {
>   		ch->using_rdma_cm = true;
>   		ch->rdma_cm.cm_id = rdma_cm_id;
>   		rdma_cm_id->context = ch;
> +	} else {
> +		ch->ib_cm.cm_id = ib_cm_id;
> +		ib_cm_id->context = ch;
>   	}
>   	/*
>   	 * ch->rq_size should be at least as large as the initiator queue

Although the above patch looks fine to me, I'm not sure this kind of 
changes should be considered as useful or as churn?

Bart.