From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6E0B3C2BA12 for ; Thu, 2 Apr 2020 20:37:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4362721655 for ; Thu, 2 Apr 2020 20:37:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="nmnmU8mU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388889AbgDBUhN (ORCPT ); Thu, 2 Apr 2020 16:37:13 -0400 Received: from ssl.serverraum.org ([176.9.125.105]:53229 "EHLO ssl.serverraum.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388234AbgDBUhN (ORCPT ); Thu, 2 Apr 2020 16:37:13 -0400 Received: from apollo.fritz.box (unknown [IPv6:2a02:810c:c200:2e91:6257:18ff:fec4:ca34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id E926723060; Thu, 2 Apr 2020 22:37:08 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1585859829; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=O32DELDjRU5+PMHK61TCvsZ+IJXO1DNHAkIMR41h4Oo=; b=nmnmU8mUF4seol8TRRYjB/GzYpAELUq0RsNPY7L6Y1/tLiSk+yt3vye6y5OtaRIqKQjZrp e6YLzlx2Q6L2SZEyldQG0fKNUNu8TjNMs/X35UHV4Ekz+Bhd89WQG6UQyXDrU+OkFEGUzU 9Amj78TVB3hj4nKbmm8cpUF+Eh4q3zA= From: Michael Walle To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Linus Walleij , Bartosz Golaszewski , Rob Herring , Jean Delvare , Guenter Roeck , Lee Jones , Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Mark Brown , Greg Kroah-Hartman , Michael Walle , Robin Murphy Subject: [PATCH v2 02/16] mfd: mfd-core: Don't overwrite the dma_mask of the child device Date: Thu, 2 Apr 2020 22:36:42 +0200 Message-Id: <20200402203656.27047-3-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200402203656.27047-1-michael@walle.cc> References: <20200402203656.27047-1-michael@walle.cc> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spamd-Bar: ++++++ X-Rspamd-Server: web X-Rspamd-Queue-Id: E926723060 X-Spamd-Result: default: False [6.40 / 15.00]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TAGGED_RCPT(0.00)[dt]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_SIGNED(0.00)[]; RCPT_COUNT_TWELVE(0.00)[25]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM(-0.00)[-0.164]; RCVD_COUNT_ZERO(0.00)[0]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:31334, ipnet:2a02:810c:8000::/33, country:DE]; FREEMAIL_CC(0.00)[linaro.org,baylibre.com,kernel.org,suse.com,roeck-us.net,gmail.com,pengutronix.de,linux-watchdog.org,nxp.com,linutronix.de,lakedaemon.net,linuxfoundation.org,walle.cc,arm.com]; SUSPICIOUS_RECIPS(1.50)[] X-Spam: Yes Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Commit cdfee5623290 ("driver core: initialize a default DMA mask for platform device") initialize the DMA of a platform device. But if the parent doesn't have a dma_mask set, for example if it's an I2C device, the dma_mask of the child platform device will be set to zero again. Which leads to many "DMA mask not set" warnings, if the MFD cell has the of_compatible property set. [ 1.877937] sl28cpld-pwm sl28cpld-pwm: DMA mask not set [ 1.883282] sl28cpld-pwm sl28cpld-pwm.0: DMA mask not set [ 1.888795] sl28cpld-gpio sl28cpld-gpio: DMA mask not set Thus don't overwrite the dma_mask of the children. Instead set the dma_mask of the platform device. Signed-off-by: Michael Walle Suggested-by: Robin Murphy --- drivers/mfd/mfd-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c index f5a73af60dd4..e735565969b3 100644 --- a/drivers/mfd/mfd-core.c +++ b/drivers/mfd/mfd-core.c @@ -138,7 +138,7 @@ static int mfd_add_device(struct device *parent, int id, pdev->dev.parent = parent; pdev->dev.type = &mfd_dev_type; - pdev->dev.dma_mask = parent->dma_mask; + pdev->platform_dma_mask = parent->dma_mask ? *parent->dma_mask : 0; pdev->dev.dma_parms = parent->dma_parms; pdev->dev.coherent_dma_mask = parent->coherent_dma_mask; -- 2.20.1