netdev - Re: [PATCH rdma-next 01/15] rds: Don't check return value from destroy CQ

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Message-ID: <9db089b4-d088-9b2a-c6ce-350e11fb5460@oracle.com>
Date:   Mon, 20 May 2019 10:17:43 -0700
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     Leon Romanovsky <leon@...nel.org>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>
Cc:     Leon Romanovsky <leonro@...lanox.com>,
        RDMA mailing list <linux-rdma@...r.kernel.org>,
        Glenn Streiff <gstreiff@...effect.com>,
        Steve Wise <swise@...ngridcomputing.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH rdma-next 01/15] rds: Don't check return value from
 destroy CQ

On 5/19/2019 11:54 PM, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@...lanox.com>
> 
> There is no value in checking ib_destroy_cq() result and skipping
> to clear struct ic fields. This connection needs to be reinitialized
> anyway.
> 
> Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
> ---
>   net/rds/ib_cm.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c
> index 66c6eb56072b..5a42ebb892cd 100644
> --- a/net/rds/ib_cm.c
> +++ b/net/rds/ib_cm.c
> @@ -611,11 +611,11 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
>   qp_out:
>   	rdma_destroy_qp(ic->i_cm_id);
>   recv_cq_out:
> -	if (!ib_destroy_cq(ic->i_recv_cq))
> -		ic->i_recv_cq = NULL;
> +	ib_destroy_cq(ic->i_recv_cq);
> +	ic->i_recv_cq = NULL;
>   send_cq_out:
> -	if (!ib_destroy_cq(ic->i_send_cq))
> -		ic->i_send_cq = NULL;
> +	ib_destroy_cq(ic->i_send_cq);
> +	ic->i_send_cq = NULL;
This was done to ensure, you still don't get ISR delivering
the CQEs while we are in shutdown path. Your patch
is fine though since you don't change that behavior.

Acked-by: Santosh Shilimkar <santosh.shilimkar@...cle.com>