From nobody Mon Sep 28 22:34:11 2026 Received: from mail-pl1-f173.google.com (mail-pl1-f173.google.com [209.85.214.173]) (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 0F7941448E0 for ; Sun, 16 Aug 2026 05:50:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786859417; cv=none; b=LV3WyeBuASRDtn+EkFzTKYAS3RaOI1kzoMcCqo3kDDnfiyczS1gbtopb1DNGH/vXC4IgQ1SiboTn+9Q3ycJAvL7lrUqPDh6tXtezKTxk+6L4queklfKuspH1la2iFer++1VPIi4ZNrYzMjcmTYCBVZR1yXZf8PSC7obGnnNu6eY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786859417; c=relaxed/simple; bh=i1aTlyXstn7XdymhqDtMrPhnqMRQ4GCTCwkWzEodu9g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iARhuiBgF9XUIufeiPHs7PyX4rtoxLNQGVKXqqEQH74EZF1OAHNJJUBV1t7xBNkrW3qN2AycjoRUbb3ZHb7VXU7oAd1LzJcihw5ULWSIxkjud7gvVkUoObAoI68lUY8qlVwpWns1CFSLW3mhvBICjoPRKYie43VRMW4Nf1K8/qc= 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=i5nTjSaP; arc=none smtp.client-ip=209.85.214.173 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="i5nTjSaP" Received: by mail-pl1-f173.google.com with SMTP id d9443c01a7336-2d53197d8b5so16234375ad.3 for ; Sat, 15 Aug 2026 22:50:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1786859415; x=1787464215; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=L7rDd1AXsbIweAe6SD2JszwD4pdpkYTmVyXxro3XLzc=; b=i5nTjSaPmHnd5AhcGb0tqBV9eJfQvcxHF4781zanD/wHtg4KrzedbbyFVp5tor4enk cTLzWdG8Z/am8AvyXOwyYctL6j2EL7crc4KCt4e1cwi6wsrRAVPTlGmIeBPa790hy3+3 BdjhTQ+f6DSIAbPKulJnB66rhJTb3R2ArSbXUZpv9/XZw5pJ54A5xIim+eqRkKwyx3Wh O//SmsWrj8HEXJX4dRvzYZJBcw8zxNKzjtkAmmx6NAzoNCp+ID5yZcngEz+roNW6lWXP lNf5HCWbT5X/R3LtW59+uYz4G17CEaZj4UFrn7g+IhDqxAaDrW15wRQfgJ/6QX8vSCby YnwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786859415; x=1787464215; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=L7rDd1AXsbIweAe6SD2JszwD4pdpkYTmVyXxro3XLzc=; b=bfAHabBAHUa8BORw4hT4gpA1Vpid98/YvynKpBSsHUd0DhO6eGjtdvWEIJrNG95DjM 12GMns/q9TzVrBx/rIhKxik6GaOXXIlM8zWvsZrUAvpMMooN7Q0LG5Q3Cjx8GAW45DpP cpSYklO591Bfay2UjOX94oLtJHoPt9JeRNpcVpNY5MimjwaOOW6wzDPJW8+Kd5S708/G iszEjanWSsI/RbaNBgSNWtE/SmJ+T1B6arlXOAdVMKNBQqznWahfBO+u7J+nNnyBWZUu qocneERlhtFFVt3Gn4RuB/iHco1qqVgAofUuZeffWny8Ykvj5l0RQZaHLs3JG7rmnx5q WEQQ== X-Forwarded-Encrypted: i=1; AHgh+RofUBoPRjCOUFIv16e5KuSIQWDRH0Sqjx6Qno4jtNUX98mrcLuX4RTJkPX+lxuTXoXoTAHkLfogdo/r1Qc=@vger.kernel.org X-Gm-Message-State: AOJu0YyhfVdsG+tq9Ln2kenP+DUBIlpFbtOxwlXHkCdbZAZg37LpJazI CkKZUP0VqKHrIkwZvpP1D1Hvt27fGeduKpowbuoJ3N6WnpVisLNMlbKS X-Gm-Gg: AR+sD10fimjFXIAmKhmHgL62LjcP2fp4sJpRZbfVpsjqwG45cGNDx7JWp2Mc/9rHwlE y83lt7Vw1HTOK0fVgggu5DeXIOuELAFKZFjc3arwU8+wHMfXupeIHhVGt4iVnrgYxjIYXkGQGlF noGa8CdHZ7ywrxgApcEBuj6RnYp7G6oei1iVZJsVHbWYbPLXx1+3OgRXjrKVbPQKUEIXx60NSlG wD9/osUYkfGldH/NEOCdO3f+q3hm+tbc3pCXUv+9hWO7WY/4xDYDnQv/H8BijmCpT3vNwUCO+DW a43mgHDw+SifUkDXwN8jpy5iC3kA9cZaSQDhtdfvGLePhuRAywHPO/1S9AawuT1aOt5NelU6w/G gGT3DrEnovWAgFj8AsMB9cWn8RhvK1E+kZaW7zj9GVRLPtAdmPJtm7IlKUBrMokm2cg945rKJAO 4PEuksaqXJMwZ5RA28fL3mzk35zFgTuVthn4e+SCr/ub8sU6YensRHSX+ijM2LCW1soR2CbpqEO A== X-Received: by 2002:a05:6a21:600c:b0:3bf:d487:4b42 with SMTP id adf61e73a8af0-3cc71ed4adamr18824280637.35.1786859415348; Sat, 15 Aug 2026 22:50:15 -0700 (PDT) Received: from amd.ban-spse ([165.204.217.251]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-320d61e1cccsm19695412eec.8.2026.08.15.22.50.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Aug 2026 22:50:15 -0700 (PDT) From: Chaithanya Lagisetty To: vkoul@kernel.org Cc: Frank.Li@kernel.org, orsonzhai@gmail.com, baolin.wang@linux.alibaba.com, zhang.lyra@gmail.com, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, nagachaithanya9911@gmail.com Subject: [PATCH v2] dmaengine: sprd: use clk_bulk API to fix clock imbalance Date: Sun, 16 Aug 2026 05:50:05 +0000 Message-ID: <20260816055005.2667930-1-nagachaithanya9911@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" sprd_dma_enable() enabled sdev->clk and then the optional ashb_clk. If enabling ashb_clk failed, sdev->clk was left enabled: both callers (probe and resume) treat a non-zero return as "nothing was enabled" and bail out, leaking sdev->clk. Convert the driver to the clk_bulk API. clk_bulk_prepare_enable() enables all clocks and unwinds them on failure, and clk_bulk_disable_unprepare() disables them, which fixes the imbalance and simplifies the enable/disable paths. The optional ashb_eb clock is fetched with devm_clk_get_optional(), so a missing clock becomes a NULL entry that the bulk helpers treat as a no-op. Fixes: 9b3b8171f7f4 ("dmaengine: sprd: Add Spreadtrum DMA driver") Signed-off-by: Chaithanya Lagisetty --- Changes since v1: - Convert the enable/disable paths to the clk_bulk API instead of manually disabling sdev->clk on the ashb_clk failure path, and fetch the optional ashb_eb clock with devm_clk_get_optional() (Frank Li). v1: https://lore.kernel.org/dmaengine/20260813105354.2577040-1-nagachaithan= ya9911@gmail.com/ drivers/dma/sprd-dma.c | 44 +++++++++++++----------------------------- 1 file changed, 13 insertions(+), 31 deletions(-) diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 087fea3af2e4..ac6fe6118ad1 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -208,8 +208,7 @@ struct sprd_dma_chn { struct sprd_dma_dev { struct dma_device dma_dev; void __iomem *glb_base; - struct clk *clk; - struct clk *ashb_clk; + struct clk_bulk_data clks[2]; int irq; u32 total_chns; struct sprd_dma_chn channels[] __counted_by(total_chns); @@ -260,31 +259,12 @@ static void sprd_dma_chn_update(struct sprd_dma_chn *= schan, u32 reg, =20 static int sprd_dma_enable(struct sprd_dma_dev *sdev) { - int ret; - - ret =3D clk_prepare_enable(sdev->clk); - if (ret) - return ret; - - /* - * The ashb_clk is optional and only for AGCP DMA controller, so we - * need add one condition to check if the ashb_clk need enable. - */ - if (!IS_ERR(sdev->ashb_clk)) - ret =3D clk_prepare_enable(sdev->ashb_clk); - - return ret; + return clk_bulk_prepare_enable(ARRAY_SIZE(sdev->clks), sdev->clks); } =20 static void sprd_dma_disable(struct sprd_dma_dev *sdev) { - clk_disable_unprepare(sdev->clk); - - /* - * Need to check if we need disable the optional ashb_clk for AGCP DMA. - */ - if (!IS_ERR(sdev->ashb_clk)) - clk_disable_unprepare(sdev->ashb_clk); + clk_bulk_disable_unprepare(ARRAY_SIZE(sdev->clks), sdev->clks); } =20 static void sprd_dma_set_uid(struct sprd_dma_chn *schan) @@ -1140,16 +1120,18 @@ static int sprd_dma_probe(struct platform_device *p= dev) if (!sdev) return -ENOMEM; =20 - sdev->clk =3D devm_clk_get(&pdev->dev, "enable"); - if (IS_ERR(sdev->clk)) { - dev_err(&pdev->dev, "get enable clock failed\n"); - return PTR_ERR(sdev->clk); - } + sdev->clks[0].id =3D "enable"; + sdev->clks[0].clk =3D devm_clk_get(&pdev->dev, "enable"); + if (IS_ERR(sdev->clks[0].clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(sdev->clks[0].clk), + "get enable clock failed\n"); =20 /* ashb clock is optional for AGCP DMA */ - sdev->ashb_clk =3D devm_clk_get(&pdev->dev, "ashb_eb"); - if (IS_ERR(sdev->ashb_clk)) - dev_warn(&pdev->dev, "no optional ashb eb clock\n"); + sdev->clks[1].id =3D "ashb_eb"; + sdev->clks[1].clk =3D devm_clk_get_optional(&pdev->dev, "ashb_eb"); + if (IS_ERR(sdev->clks[1].clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(sdev->clks[1].clk), + "get ashb_eb clock failed\n"); =20 /* * We have three DMA controllers: AP DMA, AON DMA and AGCP DMA. For AGCP --=20 2.43.0