From patchwork Thu Sep 26 23:20:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Carrasco X-Patchwork-Id: 830934 Received: from mail-ej1-f49.google.com (mail-ej1-f49.google.com [209.85.218.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B37ED19FA8A; Thu, 26 Sep 2024 23:21:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.49 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727392879; cv=none; b=LxDlZ9/VPBZRn7gQoT4f2hxUbbaz3t/igntMwkWjAPZLh+UDohaIREx+zNbvmxvRjygjYLREgp7jMm2jqcR4RvuPJUMROpV2eyRmAGooJbr3pc0en+qfMhKEcWeb8VUZ90rFhZPnww4CquAw9z6C64P2GWtv9aWHgMOe6olriRk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727392879; c=relaxed/simple; bh=ls6STftDXgqEjSON3lpk60MstLtR+0wj4jS0gZeSDb0=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=nxA+pEm2Kl2zgauEJF0gl2Mr8iwF32l9r1nJfmWVy3VAyGDUZOt/HyIunBsiIcie/1d1K8xV8b07avZraDrO3m3eUEX91p1bbFikgB9a9epD/gqReIckFYMkcDGnFXl3d/Zb8bJ+XUmGld29ikbH+5MaUtBaReMjzMqkazmK4Dg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=O+ai+Fl5; arc=none smtp.client-ip=209.85.218.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="O+ai+Fl5" Received: by mail-ej1-f49.google.com with SMTP id a640c23a62f3a-a8d0d82e76aso214509866b.3; Thu, 26 Sep 2024 16:21:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1727392876; x=1727997676; darn=vger.kernel.org; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:from:to:cc:subject:date:message-id:reply-to; bh=Bu40LWj131EvrXy4hSGWlLWhDgrzKYj+PB2hYeDUiWQ=; b=O+ai+Fl5aGIQhPLDkqv5TnU/ZvMkBvE/9TRn9DmJXbkHtlSE14IuHUFuHRCFdQwyHD 3PGjwWrahZ90rmkFevIeklAs10rr6vqpfQsyPT+zFkM5WKLaaPkWErknWSVuLgDFjqzk i1ezMrKRL0xyBTXDOe0vNun8Glp6kbqXHnGaSQIXH3mtmsK4FlnI2Va9x0DIcA73MMwM CFy7+PTatbx8w4KOoEFLGDsl8S6wfrL+cb11pGaU+TzN40AKZdHZ/10HEcYq1Yb6+yZw JyFoZMnFE/XM+OGGerlWtlKDImBUptet63808oJE39/Km/hnnaCDwUcgo42rPeP1ygEJ 8N3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727392876; x=1727997676; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Bu40LWj131EvrXy4hSGWlLWhDgrzKYj+PB2hYeDUiWQ=; b=NbuerMcDAiPVF0WNuX8+jJBdYdp6bDUvubSezE9TEaF5p9K48rdyGG1m4xPF8o1FSx hNOr/j9yMRlTQ05w9g+eA8xtaXLej5fyEzSJsKL5txhSIhrq0nxfGTE65/7YjfMOQsG5 Bif+zw26CqRCgVli+9I8YD7wF9VmnSd7N17Lq4+4nUMINOdmqkwmTyUIWyRPbFB9NtgP /JXBXKMSGy2KFb8V82R4CqxAoS/MEpNL0hImFN5NBP5O7gjZaooAU+Y1/tPdi7LIbvxe eTq5L714hqdGPgKdSuAdD2wUN2+tswcGQXYz2Q0GfhHl0Q4wcl7AJWu+rBo7GLPdvRQ0 AjbQ== X-Forwarded-Encrypted: i=1; AJvYcCUPVqFvrQ4aLmICpC/qbFdYIE4G2GCi6pS6IZYRK/OKO8YIKSeZ8zPix/k0E+17A/Pmmya7LyOT@vger.kernel.org, AJvYcCUp0Ou2uXgvzaKUfh1YNUyO7xDkubY0dRQv/Oj+rpKYMXYNnln+3aPYM977w6ptPwrUz2/XEcX4Gjk0Sns=@vger.kernel.org X-Gm-Message-State: AOJu0YzqBFZiMn8LOonzgLx8LiwyfUQlq31o9Qf+Tvq7viahksOcmKSs rXQFM/GIlyHRjOIM1T5nTc49m7nxtnHssgfrqpEIgUOs1sts78By X-Google-Smtp-Source: AGHT+IHhqjy8WeTtGJCjL8APo5icRaeNMZCgJdUWodmCHHiaovrWOaRpdybBZblfcBNu/LZxuuDbbQ== X-Received: by 2002:a17:907:9488:b0:a8c:d6a3:d038 with SMTP id a640c23a62f3a-a93c492a74emr81977066b.37.1727392875801; Thu, 26 Sep 2024 16:21:15 -0700 (PDT) Received: from [127.0.1.1] (2a02-8389-41cf-e200-3989-b03c-7705-998b.cable.dynamic.v6.surfer.at. [2a02:8389:41cf:e200:3989:b03c:7705:998b]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a93c27773c0sm50368166b.1.2024.09.26.16.21.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Sep 2024 16:21:15 -0700 (PDT) From: Javier Carrasco Subject: [PATCH 00/18] leds: switch to device_for_each_child_node_scoped() Date: Fri, 27 Sep 2024 01:20:51 +0200 Message-Id: <20240927-leds_device_for_each_child_node_scoped-v1-0-95c0614b38c8@gmail.com> Precedence: bulk X-Mailing-List: linux-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAFPs9WYC/x2N0QqDMAwAf0XyvIJ2duB+ZYxQktQGpJUGhiD++ 4qPB8fdCSZNxeA9nNDkp6a1dJgeA1COZRWn3Bn86Odx8S+3CRtyN0kw1YYSKSNl3RhLZUGjugu 7EJfgQ5inZ4rQY3uTpMc9+nyv6w9hSLI6eAAAAA== To: Pavel Machek , Lee Jones , Matthias Brugger , AngeloGioacchino Del Regno , Gene Chen , Jacek Anaszewski , Bartosz Golaszewski , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Jonathan Cameron Cc: linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-sunxi@lists.linux.dev, Javier Carrasco , stable@vger.kernel.org X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1727392874; l=3800; i=javier.carrasco.cruz@gmail.com; s=20240312; h=from:subject:message-id; bh=ls6STftDXgqEjSON3lpk60MstLtR+0wj4jS0gZeSDb0=; b=TYJknx8sMFUvP50SESSmj7bX6NpKm2bRxPVZmfQ4I0CTAI78hmnfsvCgYNyfMfsr3Zzok4S+j J2NN3jjMDyzDfwjCYYydsp8LC3zBAjJbrjq41NeJcSn3DU93waqFbfe X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=lzSIvIzMz0JhJrzLXI0HAdPwsNPSSmEn6RbS+PTS9aQ= This series switches from the device_for_each_child_node() macro to its scoped variant, which in general makes the code more robust if new early exits are added to the loops, because there is no need for explicit calls to fwnode_handle_put(). Depending on the complexity of the loop and its error handling, the code gets simplified and it gets easier to follow. The non-scoped variant of the macro is error-prone, and it has been the source of multiple bugs where the child node refcount was not decremented accordingly in error paths within the loops. The first patch of this series is a good example, which fixes that kind of bug that is regularly found in node iterators. The uses of device_for_each_child_node() with no early exits have been left untouched because their simpilicty justifies the non-scoped variant. Note that the child node is now declared in the macro, and therefore the explicit declaration is no longer required. The general functionality should not be affected by this modification. If functional changes are found, please report them back as errors. Signed-off-by: Javier Carrasco --- Javier Carrasco (18): leds: flash: mt6360: fix device_for_each_child_node() refcounting in error paths leds: flash: mt6370: switch to device_for_each_child_node_scoped() leds: flash: leds-qcom-flash: switch to device_for_each_child_node_scoped() leds: aw200xx: switch to device_for_each_child_node_scoped() leds: cr0014114: switch to device_for_each_child_node_scoped() leds: el15203000: switch to device_for_each_child_node_scoped() leds: gpio: switch to device_for_each_child_node_scoped() leds: lm3532: switch to device_for_each_child_node_scoped() leds: lm3697: switch to device_for_each_child_node_scoped() leds: lp50xx: switch to device_for_each_child_node_scoped() leds: max77650: switch to device_for_each_child_node_scoped() leds: ns2: switch to device_for_each_child_node_scoped() leds: pca963x: switch to device_for_each_child_node_scoped() leds: pwm: switch to device_for_each_child_node_scoped() leds: sun50i-a100: switch to device_for_each_child_node_scoped() leds: tca6507: switch to device_for_each_child_node_scoped() leds: rgb: ktd202x: switch to device_for_each_child_node_scoped() leds: rgb: mt6370: switch to device_for_each_child_node_scoped() drivers/leds/flash/leds-mt6360.c | 3 +-- drivers/leds/flash/leds-mt6370-flash.c | 11 +++------- drivers/leds/flash/leds-qcom-flash.c | 4 +--- drivers/leds/leds-aw200xx.c | 7 ++----- drivers/leds/leds-cr0014114.c | 4 +--- drivers/leds/leds-el15203000.c | 14 ++++--------- drivers/leds/leds-gpio.c | 9 +++------ drivers/leds/leds-lm3532.c | 18 +++++++---------- drivers/leds/leds-lm3697.c | 18 ++++++----------- drivers/leds/leds-lp50xx.c | 21 +++++++------------ drivers/leds/leds-max77650.c | 18 ++++++----------- drivers/leds/leds-ns2.c | 7 ++----- drivers/leds/leds-pca963x.c | 11 +++------- drivers/leds/leds-pwm.c | 15 ++++---------- drivers/leds/leds-sun50i-a100.c | 27 +++++++++---------------- drivers/leds/leds-tca6507.c | 7 ++----- drivers/leds/rgb/leds-ktd202x.c | 8 +++----- drivers/leds/rgb/leds-mt6370-rgb.c | 37 ++++++++++------------------------ 18 files changed, 75 insertions(+), 164 deletions(-) --- base-commit: 92fc9636d1471b7f68bfee70c776f7f77e747b97 change-id: 20240926-leds_device_for_each_child_node_scoped-5a95255413fa Best regards,