From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20AB2C433E0 for ; Mon, 18 Jan 2021 23:42:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DD30C230FB for ; Mon, 18 Jan 2021 23:42:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733066AbhARXmJ (ORCPT ); Mon, 18 Jan 2021 18:42:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726044AbhARXmG (ORCPT ); Mon, 18 Jan 2021 18:42:06 -0500 Received: from mail-lf1-x129.google.com (mail-lf1-x129.google.com [IPv6:2a00:1450:4864:20::129]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B794CC061575 for ; Mon, 18 Jan 2021 15:41:25 -0800 (PST) Received: by mail-lf1-x129.google.com with SMTP id a12so26520264lfl.6 for ; Mon, 18 Jan 2021 15:41:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=GP2l2YRI6TVb8gN7OWAFVoVqp+WiahRa3B+dRrNEiPU=; b=WOzat1WetLRWnAESYA3O49tBhTQCjHCLFVtDNYpLSd61NKm6e3OmOZpXfFvVQB7QP/ yl97PSM5i42TD20b17Sv86bQ2qmdsbLCMUeGrhNR/ZrAcFAlIk9TjPsRJBL27TvZ8ZNo SQW/4ENF70wDA1AjcM156xLA8jMM6MCwJPB4U= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=GP2l2YRI6TVb8gN7OWAFVoVqp+WiahRa3B+dRrNEiPU=; b=rE+IcP4zBzgwkGOUsL+ZPCB0PWbaJazp5JChzIn6ffXqHjReKbhXGm6i0BWJrEOk9v HzfUu/MTWdOCyIZC5mitD+XyN+8gTUNo1midAHmHvJyo9WVkqGfgBhVUPpnLxrKabhVi +R1anq0sN5sPAa7tlON0RXPnfa95YpnYOs16UyNbDmZK9aWahuPuuy4M7gv0V45p96hG EeJUO+IQp9+pUudV2vQNOeZM/WKxD7yJuYUjfGDM3M5VczH2iAe7x5P4+g+nYg/qMUil 0O0+OkqbsfxGN68RkKIQ8uybsCpAbsLpt60st+9cK1LTxJGha6LWYnbDhlDOr4t/wx9t Be6Q== X-Gm-Message-State: AOAM533DK+jeA0VmKqN5BgR15XXEm/4rouW+ZBrEppSNhnuXtR7/JqYN 3LMYz89OhrFw5qgAzApJK60oexcB1fSTiw70F+My4yjc4ek= X-Google-Smtp-Source: ABdhPJz5qEbsq9rONpy3UoCwlesHtP4w76AE9y47dgzXBR5447pwr2cGva/ZqBVz6SqV7f8bCrGgL6kfwoedkuFTEWk= X-Received: by 2002:a05:6512:33b5:: with SMTP id i21mr624389lfg.228.1611013284083; Mon, 18 Jan 2021 15:41:24 -0800 (PST) MIME-Version: 1.0 References: <20210113121222.733517-1-jiri@resnulli.us> <9b940a66-8c91-34c1-e64e-42b92bf403a8@gmail.com> In-Reply-To: <9b940a66-8c91-34c1-e64e-42b92bf403a8@gmail.com> From: Edwin Peer Date: Mon, 18 Jan 2021 15:40:47 -0800 Message-ID: Subject: Re: [patch net-next RFC 00/10] introduce line card support for modular switch To: David Ahern Cc: Jiri Pirko , netdev , "David S . Miller" , Jakub Kicinski , Jacob Keller , roopa@nvidia.com, mlxsw Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000008acac505b9354282" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org --0000000000008acac505b9354282 Content-Type: text/plain; charset="UTF-8" On Mon, Jan 18, 2021 at 2:57 PM David Ahern wrote: > On 1/18/21 11:01 AM, Edwin Peer wrote: > > I'm facing a similar issue with NIC firmware that isn't yet ready by > > device open time, but have been resisting the urge to lie to the stack > > why not have the ndo_open return -EBUSY or -EAGAIN to tell S/W to try > again 'later'? Indeed, this is what we ended up doing, although we still need to confirm Network Manager, systemd and whatever else our customers might use do the necessary to satisfy the user requirement to handle the delayed init. Only reason I piped up is that this line card thing seems to introduce a similar issue. 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