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Mon, 16 Aug 2021 07:11:15 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id w9sm1357297oti.35.2021.08.16.07.11.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 16 Aug 2021 07:11:14 -0700 (PDT) Subject: Re: [PATCH] hw: ppc: sam460ex: Disable Ethernet devicetree nodes To: Peter Maydell References: <20210816025915.213093-1-linux@roeck-us.net> <6b0a3a08-a57b-fbb6-71d8-3760d76fd265@roeck-us.net> From: Guenter Roeck Message-ID: <1ac55b8f-db96-0747-5beb-2016ef4bb6b1@roeck-us.net> Date: Mon, 16 Aug 2021 07:11:13 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::22a; envelope-from=groeck7@gmail.com; helo=mail-oi1-x22a.google.com X-Spam_score_int: -49 X-Spam_score: -5.0 X-Spam_bar: ----- X-Spam_report: (-5.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FORGED_FROMDOMAIN=0.248, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.248, NICE_REPLY_A=-3.71, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Greg Kurz , qemu-ppc , QEMU Developers , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 8/16/21 7:03 AM, Peter Maydell wrote: > On Mon, 16 Aug 2021 at 15:00, Guenter Roeck wrote: >> The controllers are instantiated (it looks like the Linux driver doesn't >> really check during probe if the hardware is present but relies on DT), >> but when trying to access them there is a PHY error. If a different Ethernet >> device is explicitly specified and instantiated, it either ends up as eth2 >> or as eth0, depending on the driver load order. That makes it difficult >> to test those other Ethernet devices (and with it the PCI controller). > > I thought that code wasn't supposed to rely on the naming/ordering of > ethX anyway these days? > Depends on what you call "that code". I use small buildroot based root file systems for testing which do depend on the load order (or, rather, on eth0 working). Guenter