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[23.128.96.37]) by mx.google.com with ESMTPS id w2-20020a170902c78200b001bba4470991si4678221pla.498.2023.09.16.03.19.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 Sep 2023 03:20:05 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37; Authentication-Results: mx.google.com; dkim=pass header.i=@linux.dev header.s=key1 header.b=CIYfBgQ2; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.dev Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by snail.vger.email (Postfix) with ESMTP id E6C4C83B5723; Fri, 15 Sep 2023 19:29:32 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236656AbjIPC2y (ORCPT + 99 others); Fri, 15 Sep 2023 22:28:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237962AbjIPC2X (ORCPT ); Fri, 15 Sep 2023 22:28:23 -0400 Received: from out-226.mta1.migadu.com (out-226.mta1.migadu.com [95.215.58.226]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BC20C1BF8 for ; Fri, 15 Sep 2023 19:28:17 -0700 (PDT) Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1694831293; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SvtGlibQ0yiv0zX+Y4QAMspnPl76rPSHm/0SF9GzIiA=; b=CIYfBgQ2nOj+uwXfF3zhuTSiSGT4cGUE2wiUXUkMx/z0eQyUW1n9uyeDX9UnS7I4auEGax 2TCGkZ1gt2YohH/mpJhhNQzwsZa3Shw5Mv5omaUKC988avV00VZgsFCgzYP7UeaKwFzsJA EdgiBVxspqyAhIKpsaow5ECJccZw8Uo= Date: Sat, 16 Sep 2023 10:28:06 +0800 MIME-Version: 1.0 Subject: Re: [PATCH v2 2/2] RDMA/rxe: Call rxe_set_mtu after rxe_register_device To: Li Zhijian , linux-rdma@vger.kernel.org Cc: zyjzyj2000@gmail.com, jgg@ziepe.ca, leon@kernel.org, linux-kernel@vger.kernel.org, rpearsonhpe@gmail.com, Daisuke Matsuda References: <20230823061141.258864-1-lizhijian@fujitsu.com> <20230823061141.258864-2-lizhijian@fujitsu.com> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Zhu Yanjun In-Reply-To: <20230823061141.258864-2-lizhijian@fujitsu.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Fri, 15 Sep 2023 19:29:33 -0700 (PDT) 在 2023/8/23 14:11, Li Zhijian 写道: > rxe_set_mtu() will call rxe_info_dev() to print message, and > rxe_info_dev() expects dev_name(rxe->ib_dev->dev) has been assigned. > > Previously since dev_name() is not set, when a new rxe link is being > added, 'null' will be used as the dev_name like: > > "(null): rxe_set_mtu: Set mtu to 1024" > > Move rxe_register_device() earlier to assign the correct dev_name > so that it can be read by rxe_set_mtu() later. > > And it's safe to do such change since mtu will not be used during the > rxe_register_device() > > After this change, message becomes: > "rxe_eth0: rxe_set_mtu: Set mtu to 4096" > > Reviewed-by: Daisuke Matsuda > Signed-off-by: Li Zhijian In rxe_register_device function, the correct dev_name is assigned. So the rxe_info_dev in rxe_set_mtu can use the correct dev_name. I am fine with it. It seems that it is a trivial problem. If the Fixes tag is added, then we can know which commit introduces this problem, it is better. Reviewed-by: Zhu Yanjun Thanks, Zhu Yanjun > --- > drivers/infiniband/sw/rxe/rxe.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/infiniband/sw/rxe/rxe.c b/drivers/infiniband/sw/rxe/rxe.c > index a086d588e159..8a43c0c4f8d8 100644 > --- a/drivers/infiniband/sw/rxe/rxe.c > +++ b/drivers/infiniband/sw/rxe/rxe.c > @@ -169,10 +169,13 @@ void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) > */ > int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name) > { > + int ret; > + > rxe_init(rxe); > + ret = rxe_register_device(rxe, ibdev_name); > rxe_set_mtu(rxe, mtu); > > - return rxe_register_device(rxe, ibdev_name); > + return ret; > } > > static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)