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Thu, 29 Oct 2026 12:06:52 -0700 (PDT) Received: from localhost ([2a00:79e0:2ebe:8:8310:80a5:1043:3f70]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1ac192c2e9dsm766922c88.9.2026.10.29.12.06.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Oct 2026 12:06:51 -0700 (PDT) Date: Thu, 29 Oct 2026 12:06:50 -0700 Message-ID: From: Dmitry Torokhov To: Arnd Bergmann Cc: Guenter Roeck , Russell King , Linus Walleij , Bartosz Golaszewski , soc@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, "open list:GPIO SUBSYSTEM" Subject: Re: [PATCH 1/4] gpio: sa1100: register software node for GPIO controller In-Reply-To: <8bc1c573-bd4f-4dfe-9d7b-8b17d386ada7@app.fastmail.com> References: <20260706-sa1100-swnode-v1-0-332759bbd930@gmail.com> <20260706-sa1100-swnode-v1-1-332759bbd930@gmail.com> <2a561a27-a3bf-4cac-a4dc-bfbc5c859f45@roeck-us.net> <8bc1c573-bd4f-4dfe-9d7b-8b17d386ada7@app.fastmail.com> X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi Arnd, Guenter, On Thu, Oct 29, 2026 at 10:26:05AM +0100, Arnd Bergmann wrote: > On Thu, Oct 29, 2026, at 05:23, Guenter Roeck wrote: > > With this patch in the tree, the qemu "collie" emulation no longer works. > > There is no console output. ... > Hopefully Dmitry can spot an obvious fix for the regression, otherwise > a revert is probably best so we can leave collie working in the LTS > kernel and not spend much work on that. sa1100_init_gpio() runs during init_IRQ(), before driver_init() sets up swnode_kset, so software_node_register() crashed dereferencing a NULL kset pointer before the console came up. Only the GPIO IRQ setup needs to happen in init_IRQ(), so I posted a fix deferring the software node and gpiochip registration to postcore_initcall (verified with qemu collie): https://lore.kernel.org/r/20261029-sa1100-swnode-fix-v1-1-112f4d83d191@gmail.com Thanks. -- Dmitry