From nobody Mon Sep 28 10:46:32 2026 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 109A53845CB; Sun, 23 Aug 2026 10:18:51 +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=1787480332; cv=none; b=GZjw9nu6WcgMkIzSRqfgzHmjf4nS9nrn+lRz22CTH+jnbrpgIG1TJFvhTg10B2dwYn/fWFb0bGxitQs1DavFdB24XEfUjyEQ0gYI7DINhCEpI6Lhe0VnFKAMI583yNYT280ZkrxUN2xIwmuwgYUrim9YA/qVgV6IiIrIS9IAW8c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787480332; c=relaxed/simple; bh=UCkzaPhSGO4ZVsnknrA2AhJpOIQPs7yYIg1k0JB+Rxw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=SqGBVdzbzaxetVOZkaUcP6yJD//9HHCqCuMNP99qmhaFxq06ct4QpoouPzbJtFpJXljwLPZZmVx7XjYoTuM/XSaI10WQtdhlTfB/gvBVzASYJeiYwZxXTGr6l1Yg2Eay9U3kDoG+GgtFDo7BBZywB9KPuxxZb5KSUv8en8KzKUc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kOoJ/TnI; 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="kOoJ/TnI" Received: by smtp.kernel.org (Postfix) with ESMTPS id 804A2C2BCB8; Sun, 23 Aug 2026 10:18:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1787480331; bh=UCkzaPhSGO4ZVsnknrA2AhJpOIQPs7yYIg1k0JB+Rxw=; h=From:Date:Subject:To:Cc:Reply-To:From; b=kOoJ/TnIl3mns11ANZUBrNPY5p/hxtOgh9KLoLt/eJKF3aVWH8ghNGH/qAnIX4qHY GuW2UZOez6T37i2w2+gnBvrKft0APouV4k4sbZaviWNACcoHZVum1OVa0t6FI3Nshs CNBJw3rq2Tc8syycCcrIJqJLQcz8Q8TE5BB5gIzOLrJNXyrgliiFhaZ+fsq4s/UYpZ lOUgX23XIZO8qVKXNweXdWH+0EE7xvUstGltsNXTIMfK2XqaeNKz4D0989USgQBsP0 24LHyOqPIggP3Y9PyRv2aygWEwGuN91uiygnvFFnzAbr0Ye+kHcBtPtPS+pNhPNLt/ IQtCsEonPm08Q== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 55B55C5DF97; Sun, 23 Aug 2026 10:18:51 +0000 (UTC) From: David Heidelberg via B4 Relay Date: Sun, 23 Aug 2026 12:18:46 +0200 Subject: [PATCH] mfd: wcd934x: set DMA mask on parent to silence "DMA mask not set" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260823-wcd-dma-v1-1-95e44a315ccf@ixit.cz> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIzMDCyNj3fLkFN2U3ETdpBQzI8PUVGNLCwtzJaDqgqLUtMwKsEnRsRB+cWl SVmpyCUi7Um0tACVF4qVrAAAA X-Change-ID: 20260823-wcd-dma-bd621ee39887 To: Lee Jones , Thomas Tai , Konrad Rzeszutek Wilk Cc: mfd@lists.linux.dev, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, stable@vger.kernel.org, David Heidelberg X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1873; i=david@ixit.cz; h=from:subject:message-id; bh=+yZV0yAzUP//COgwea2L7HsDDH8oBkgszVtJRU6JO78=; b=owEBbQKS/ZANAwAIAWACP8TTSSByAcsmYgBqiskJtyAhDlPxeiHVZWm51nydba6sUveI5NDd6 1VGzK6kJ+qJAjMEAAEIAB0WIQTXegnP7twrvVOnBHRgAj/E00kgcgUCaorJCQAKCRBgAj/E00kg cmTkEADEeY4NllOg/3iSQJ708Hp/0muay7InorawmJzkvi1Foivu8zScHDsfxuL09oxEl/q59iG s3BRCI9SZeSrA69UnAQnnnCuf/JE/Y1KmEO4ODvmjb0jU2T0987mu9QiNCNUm/5B9ajno3z4iCN K405jXYHiGU/LebT4RKDpKlaG3qmRRGgIudR27oLJkKSyG8QC0qEloge2WoGWEaPtsrqbQg5NzI 6mfPIvg+dnKgTZ/Piz9cqVCPtBQiQFKnQ+R7suQ8VtqeDJQlLDyJyInHpvpwJyNvuifCpCFVn6g mKOKS0wYkUgE5gA7aAJh4eosXj7b+lL5PJ6cTYISuRBpQkTuIuRDXWOQnymSAmC8A0O0w8vssEF 8aTMdcwx6XSzHr+gU9zIcMTEbLP5EMBXSXgC+tsqmBb0aGxk3vzOa/oMKgKbJLe/2SokI2tlxXa ZE2t4cOE5oF5iIL7tCyIBjRFDB0bmWmFbYAYFxhkXA6XS5hZjp44s3thrv3pU3TDmyWyJgGPzld puhLOv4n9EB2tPbUNFFCRoBXB823eeZCgXzxzJvYI295o8ndkbYhJhl6hiY+zcI4Cvweqetq+wN WxwP3b3p/h8izpKNYl6nu7CQzDE7Uwc1XOvWql2beM+OVA8l76EgSDcrS5/c2hWhA8IXIYBiruR 0xhPPQH40bxRY7Q== X-Developer-Key: i=david@ixit.cz; a=openpgp; fpr=D77A09CFEEDC2BBD53A7047460023FC4D3492072 X-Endpoint-Received: by B4 Relay for david@ixit.cz/default with auth_id=355 X-Original-From: David Heidelberg Reply-To: david@ixit.cz From: David Heidelberg The wcd934x MFD parent (a slim_device) never initializes its dma_mask/coherent_dma_mask. When the DT-aware children pass through of_dma_configure() this triggers the "DMA mask not set" warning for each child. Cc: stable@vger.kernel.org Fixes: f959dcd6ddfd ("dma-direct: Fix potential NULL pointer dereference") Assisted-by: tencent:hy3 Signed-off-by: David Heidelberg --- drivers/mfd/wcd934x.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mfd/wcd934x.c b/drivers/mfd/wcd934x.c index 3c3080e8c8cf7..70ee13791d52b 100644 --- a/drivers/mfd/wcd934x.c +++ b/drivers/mfd/wcd934x.c @@ -1,12 +1,13 @@ // SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2019, Linaro Limited =20 #include +#include #include #include #include #include #include #include #include #include @@ -212,16 +213,21 @@ static int wcd934x_slim_status(struct slim_device *sd= ev, static int wcd934x_slim_probe(struct slim_device *sdev) { struct device *dev =3D &sdev->dev; struct device_node *np =3D dev->of_node; struct wcd934x_ddata *ddata; struct gpio_desc *reset_gpio; int ret; =20 + if (!dev->dma_mask) { + dev->dma_mask =3D &dev->coherent_dma_mask; + dev->coherent_dma_mask =3D DMA_BIT_MASK(32); + } + ddata =3D devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); if (!ddata) return -ENOMEM; =20 ddata->irq =3D of_irq_get(np, 0); if (ddata->irq < 0) return dev_err_probe(ddata->dev, ddata->irq, "Failed to get IRQ\n"); --- base-commit: 7079a12d7506b07fb53b54a664bfad5fa9b16d70 change-id: 20260823-wcd-dma-bd621ee39887 Best regards, -- =20 David Heidelberg