netdev - Re: [PATCH net-next] sctp: remove dead code from sctp_apply_peer_addr

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Message-ID: <20170113203024.GF3781@localhost.localdomain>
Date:   Fri, 13 Jan 2017 18:30:24 -0200
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     netdev@...r.kernel.org
Cc:     linux-sctp@...r.kernel.org, Vlad Yasevich <vyasevich@...il.com>,
        Neil Horman <nhorman@...driver.com>
Subject: Re: [PATCH net-next] sctp: remove dead code from
 sctp_apply_peer_addr_params

On Fri, Jan 13, 2017 at 06:27:32PM -0200, Marcelo Ricardo Leitner wrote:
> sctp_frag_point() doesn't store anything, and thus just calling it
> cannot do anything useful.

Please ignore this one. Will post another one with
s/dead code/useless code/ , as the code not really dead..

> 
> sctp_apply_peer_addr_params is only called by
> sctp_setsockopt_peer_addr_params. When operating on an asoc,
> sctp_setsockopt_peer_addr_params will call sctp_apply_peer_addr_params
> once for the asoc, and then once for each transport this asoc has,
> meaning that the frag_point will be recomputed when updating the
> transports and calling it when updating the asoc is not necessary.
> IOW, no action is needed here and we can remove this call.
> 
> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
> ---
>  net/sctp/socket.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/net/sctp/socket.c b/net/sctp/socket.c
> index 318c6786d6539a301ac7b76d82a49a1af3818d10..635e0341269330187c78ba93a35689f5c5d6be02 100644
> --- a/net/sctp/socket.c
> +++ b/net/sctp/socket.c
> @@ -2430,7 +2430,6 @@ static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
>  			sctp_assoc_sync_pmtu(sctp_opt2sk(sp), asoc);
>  		} else if (asoc) {
>  			asoc->pathmtu = params->spp_pathmtu;
> -			sctp_frag_point(asoc, params->spp_pathmtu);
>  		} else {
>  			sp->pathmtu = params->spp_pathmtu;
>  		}
> -- 
> 2.9.3
> 
> --
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