linux-kernel - Re: [PATCH] RDMA/cxgb4: Cleanup unused assignments

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Message-ID: <Ytj9pHgPmp9rYeku@unreal>
Date:   Thu, 21 Jul 2022 10:17:56 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     zys.zljxml@...il.com, bharat@...lsio.com
Cc:     jgg@...pe.ca, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yushan Zhou <katrinzhou@...cent.com>
Subject: Re: [PATCH] RDMA/cxgb4: Cleanup unused assignments

On Tue, Jul 19, 2022 at 05:09:48PM +0800, zys.zljxml@...il.com wrote:
> From: Yushan Zhou <katrinzhou@...cent.com>
> 
> The variable err is reassigned before the assigned value works.
> Cleanup unused assignments reported by Coverity.
> 
> Addresses-Coverity: ("UNUSED_VALUE")
> Signed-off-by: Yushan Zhou <katrinzhou@...cent.com>
> ---
>  drivers/infiniband/hw/cxgb4/cm.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
> index c16017f6e8db..3462fe991f93 100644
> --- a/drivers/infiniband/hw/cxgb4/cm.c
> +++ b/drivers/infiniband/hw/cxgb4/cm.c
> @@ -1590,7 +1590,6 @@ static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
>  					insuff_ird = 1;
>  			}
>  			if (insuff_ird) {
> -				err = -ENOMEM;
>  				ep->ird = resp_ord;
>  				ep->ord = resp_ird;
>  			}
> @@ -1655,7 +1654,7 @@ static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
>  		attrs.ecode = MPA_NOMATCH_RTR;
>  		attrs.next_state = C4IW_QP_STATE_TERMINATE;
>  		attrs.send_term = 1;
> -		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
> +		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
>  				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
>  		err = -ENOMEM;

I would prefer do not overwrite errors returned from the functions
unless it is really necessary.

Can anyone from chelsio help here?

Thanks

>  		disconnect = 1;
> @@ -1674,7 +1673,7 @@ static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
>  		attrs.ecode = MPA_INSUFF_IRD;
>  		attrs.next_state = C4IW_QP_STATE_TERMINATE;
>  		attrs.send_term = 1;
> -		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
> +		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
>  				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
>  		err = -ENOMEM;
>  		disconnect = 1;
> -- 
> 2.27.0
>