From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD254183CC3; Mon, 2 Mar 2026 00:27:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772411274; cv=none; b=ps1N2ewQYScVyaYszYKbUXTpyAsBHfcIPPGaY8GO/WqVIhAR6HJRSOKLUAcEkrIh53Pr1zhzLReYwyVwG+0kiJjgdT10k5ohl3Rph8SLqmRrKpWx1Y6CZ0dVf/nTWAJSZmCZQU8l6wHq64DbtzucZ199fpalS/3DN2tbsoQtswo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772411274; c=relaxed/simple; bh=Pns+Gig1BWJSqDMXsjGA6andnLvpaxx09TdwPTjU55g=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=UZHZp1wkJKyBMObNjnOTGv5tkjC4/ujSP2s+jxgYkyvs9+Q7siOKZfPKRyOtut26VXRlasMzmaZHvqiGpKagf80MqhWezbhE8BrOTbmXZZjtLMyBIio5BKJdw68jYxm4Oak7f1wls2k1Pi1hq/hcjb5F1dvdPnzXF1V/5W5SXLQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EjtZn7Aa; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EjtZn7Aa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8E8EEC116C6; Mon, 2 Mar 2026 00:27:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772411274; bh=Pns+Gig1BWJSqDMXsjGA6andnLvpaxx09TdwPTjU55g=; h=From:To:Cc:Subject:Date:From; b=EjtZn7AaXiIU2Ks2SxjbV1LgW/hXT8bmYzHXEb91QrW0MDYwU5i3yjwu31XlQXr/+ cl5+dWxBDhFArVxrZ77ImiU6MLDVYrimHtUcgsWKnfXhgfJr+R1hJnwzcKDn+izlHJ YltjyggOMjkjkDbDycQSpjLu3SsHHKexwU6tY/xF+E0DenRaySoNiWUueHXxSEg3hE 9X2cgbajLIaz5vrCxD5UoTerJyGusi22Gxcw+TyifyZa9hPtQZvT3ewKFd18js4S1g KJbr9EEUCFaUBJ4r3hWVMlGQnRu0MQ3kZ0jnGNnPDb4wOkbDQ1rJj0+UW+vXENIium yce6JBBlvZa4Q== From: Danilo Krummrich To: gregkh@linuxfoundation.org, rafael@kernel.org, hanguidong02@gmail.com, ysato@users.sourceforge.jp, dalias@libc.org, glaubitz@physik.fu-berlin.de, abelvesa@kernel.org, srini@kernel.org, s.nawrocki@samsung.com, nuno.sa@analog.com Cc: driver-core@lists.linux.dev, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-hwmon@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-sound@vger.kernel.org, linux-sh@vger.kernel.org, Danilo Krummrich Subject: [PATCH 0/3] driver core: generalize driver_override infrastructure Date: Mon, 2 Mar 2026 01:25:55 +0100 Message-ID: <20260302002729.19438-1-dakr@kernel.org> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-sh@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Currently, there are 12 busses (including platform and PCI) that duplicate the driver_override logic for their individual devices. All of them seem to be prone to the bug described in [1]. While this could be solved for every bus individually using a separate lock, solving this in the driver-core generically results in less (and cleaner) changes overall. Thus, move driver_override to struct device, provide corresponding accessors for busses and handle locking with a separate lock internally. In particular, add device_set_driver_override(), device_has_driver_override(), device_match_driver_override() and a helper, DEVICE_ATTR_DRIVER_OVERRIDE(), to declare the corresponding sysfs store() and show() callbacks. Until all busses have migrated, keep driver_set_override() in place. Note that we can't use the device lock for the reasons described in [2]. This patch series includes the migration of the platform bus; patches for all other affected busses still need to be extracted as a follow-up of the WIP treewide patch in [3]. [1] https://bugzilla.kernel.org/show_bug.cgi?id=220789 [2] https://lore.kernel.org/driver-core/DGRGTIRHA62X.3RY09D9SOK77P@kernel.org/ [3] https://git.kernel.org/pub/scm/linux/kernel/git/dakr/linux.git/log/?h=driver_override Danilo Krummrich (3): driver core: generalize driver_override in struct device hwmon: axi-fan: don't use driver_override as IRQ name driver core: platform: use generic driver_override infrastructure arch/sh/drivers/platform_early.c | 6 ++- drivers/base/core.c | 2 + drivers/base/dd.c | 60 +++++++++++++++++++++++ drivers/base/platform.c | 35 ++------------ drivers/bus/simple-pm-bus.c | 4 +- drivers/clk/imx/clk-scu.c | 3 +- drivers/hwmon/axi-fan-control.c | 2 +- drivers/slimbus/qcom-ngd-ctrl.c | 6 +-- include/linux/device.h | 81 ++++++++++++++++++++++++++++++++ include/linux/platform_device.h | 5 -- sound/soc/samsung/i2s.c | 6 +-- 11 files changed, 161 insertions(+), 49 deletions(-) base-commit: 78437ab3b769f80526416570f60173c89858dd84 -- 2.53.0