linux-kernel - Re: [PATCH net-next v1] sunrpc: Use ERR

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Message-ID: <ZtCLfXUnx9tbwubD@tissot.1015granger.net>
Date: Thu, 29 Aug 2024 10:53:49 -0400
From: Chuck Lever <chuck.lever@...cle.com>
To: Yan Zhen <yanzhen@...o.com>
Cc: jlayton@...nel.org, trondmy@...nel.org, anna@...nel.org,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux-nfs@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, opensource.kernel@...o.com,
        neilb@...e.de, okorniev@...hat.com, tom@...pey.com, Dai.Ngo@...cle.com
Subject: Re: [PATCH net-next v1] sunrpc: Use ERR_CAST() to return

On Thu, Aug 29, 2024 at 09:04:34PM +0800, Yan Zhen wrote:
> Using ERR_CAST() is more reasonable and safer, When it is necessary
> to convert the type of an error pointer and return it.
> 
> Signed-off-by: Yan Zhen <yanzhen@...o.com>
> ---
>  net/sunrpc/clnt.c                        | 2 +-
>  net/sunrpc/xprtrdma/svc_rdma_transport.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
> index 09f29a95f2bc..8ee87311b348 100644
> --- a/net/sunrpc/clnt.c
> +++ b/net/sunrpc/clnt.c
> @@ -603,7 +603,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
>  
>  	xprt = xprt_create_transport(&xprtargs);
>  	if (IS_ERR(xprt))
> -		return (struct rpc_clnt *)xprt;
> +		return ERR_CAST(xprt);
>  
>  	/*
>  	 * By default, kernel RPC client connects from a reserved port.
> diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
> index 581cc5ed7c0c..c3fbf0779d4a 100644
> --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
> +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
> @@ -369,7 +369,7 @@ static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
>  	listen_id = svc_rdma_create_listen_id(net, sa, cma_xprt);
>  	if (IS_ERR(listen_id)) {
>  		kfree(cma_xprt);
> -		return (struct svc_xprt *)listen_id;
> +		return ERR_CAST(listen_id);
>  	}
>  	cma_xprt->sc_cm_id = listen_id;
>  
> -- 
> 2.34.1
> 
> 

These two hunks should go through separate trees, I think.

The clnt.c hunk needs to go through Anna and Trond's NFS client
tree, and the svc_rdma_transport.c hunk can go through the NFSD
tree (ie, To: me and Jeff).

Can you send two separate patches, please? The RDMA hunk looks OK to
me and I plan to apply it upon receipt of a separate patch.

-- 
Chuck Lever