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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B070FC3600B for ; Tue, 25 Mar 2025 17:15:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=A/Zq5XGT/kIlWyhGINZJV5aAesNid1InPW+t4ko0jbc=; b=FZe1XcMd6tHJ+tBgLaygrdTjaS 2yLtg2YXQHzxRJWp1ZekKE9svD3+q7R/PXYVLDKItRYnw9wPRQlkXTdx776z1/zUxvD5h+abs8OHt ZgCx0nu1ajA78GV7SxPofm1OtdLvT+j9kLNINE33iqXgege4tW7Sy1ICi/H8jrY+hnl8TdY2BXkRr 7leMF1yjBevHPsl/cTv/1VPzPkaC4hOqcZxsxlAItBHNGz3OWb7+LCtHO0hHsJBzy7JRPaAYVjWiS 6DlIaDonbTznlh69dfeiswCNshNeTMSR8eHfOhWc9YXHqa+pQJK1UaT8+soPT2h68cL43ZQ5LDdcY rq3bqmbQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.1 #2 (Red Hat Linux)) id 1tx7s0-00000006ajo-1sWv; Tue, 25 Mar 2025 17:15:20 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.1 #2 (Red Hat Linux)) id 1tx7q5-00000006aS8-0LIZ for linux-arm-kernel@lists.infradead.org; Tue, 25 Mar 2025 17:13:22 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 5D50B43D39; Tue, 25 Mar 2025 17:13:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A3F44C4CEEA; Tue, 25 Mar 2025 17:13:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1742922800; bh=jGnsNNqQFq4AFO1RW92tn8Xhe0BA642opne2cbpSA5o=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=gPVu/LM1wKIDTkspAc7J/yrSrVRVXQduRpKBOP6TIV/6w8yqnQgqZQPJQPTLEgAei DLsQniEdkNW/vkjwGI3pbDZQsGcH58JJQuOQjhJyheHoehmCr35BpUrQRGefSUBiQc AZjrLGWlUpDeA9agOxNgB5CSeCKk1DrbYsYiQj9j3XT7QMAzeHtQ5nJTnl8Tc/UENQ lE5+evjrmlabTa53FNOxfInA3Pj5pt/kcvcU4GcPKN7Vx7AfGy1iSANRj7LSW0AHsK lZrAjmDCUpsFvyyhz1f28oXqj4BLuoVvOzKg+t+yEZMpkKuzCCy0JWp6Co7xft70vh FNd5blcpRBa8g== Message-ID: <39ec01b8-c2d7-47c3-90d9-32fe41f08a5d@kernel.org> Date: Tue, 25 Mar 2025 18:13:10 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 5/5] net: mtip: The L2 switch driver for imx287 To: Lukasz Majewski , Andrew Lunn Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Paolo Abeni , Jakub Kicinski , Eric Dumazet , davem@davemloft.net, Andrew Lunn , Pengutronix Kernel Team , Fabio Estevam , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Richard Cochran , netdev@vger.kernel.org, Maxime Chevallier References: <20250325115736.1732721-1-lukma@denx.de> <20250325115736.1732721-6-lukma@denx.de> <32d93a90-3601-4094-8054-2737a57acbc7@kernel.org> <20250325142810.0aa07912@wsk> <0a908dc7-55eb-4e23-8452-7b7d2e0f4289@lunn.ch> <20250325173846.4c7db33c@wsk> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250325_101321_168431_A5BE98D3 X-CRM114-Status: GOOD ( 14.83 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 25/03/2025 17:38, Lukasz Majewski wrote: >>>> >>>> I don't understand this code. Do you want to re-implement >>>> get_optional? But why? >>> >>> Here the get_optional() shall be used. >> >> This is the problem with trying to use old code. It needs more work >> than just making it compile. It needs to be brought up to HEAD of >> mainline standard, which often nearly ends in a re-write. > > But you cannot rewrite this code from scratch, as the IP block is not > so well documented, and there maybe are some issues that you are not > aware of. > > Moreover, this code is already in production use, and you don't want to > be in situation when regression tests cannot be run. This is a good reason to add it to staging, but not to mainline. Just because someone has somewhere products with poor code is not the reason to accept that poor code. Otherwise all the people and companies who upstream BEFORE would be quite disappointed. Why anyone would care to work on upstreaming BEFORE hardware release, if you can ship whatever to production and then ask mainline to pick up "because it is in production use". Best regards, Krzysztof