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bh=O32DELDjRU5+PMHK61TCvsZ+IJXO1DNHAkIMR41h4Oo=; b=BmHiCugHoAJPjWdcPsqC/XucGyimUwyR7ljjoG2WIKdykksBgKQ8THpqZIbWocuQYvpvOw 55hBB22TCO4PjNoISSMzLGGrf7TkFC6xc+6Zr+M2zViunfOf0Cik6S8+mN2sdBFKfKNwab GPV93vOrnwD822EFBaNiWGtbPtzT6cA= 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 Subject: [PATCH 02/18] mfd: mfd-core: Don't overwrite the dma_mask of the child device Date: Tue, 17 Mar 2020 21:50:01 +0100 Message-Id: <20200317205017.28280-3-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200317205017.28280-1-michael@walle.cc> References: <20200317205017.28280-1-michael@walle.cc> MIME-Version: 1.0 X-Spamd-Bar: ++++++ X-Spam-Level: ****** X-Rspamd-Server: web X-Spam-Status: Yes, score=6.40 X-Spam-Score: 6.40 X-Rspamd-Queue-Id: 0EC5523E4D 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)[]; NEURAL_SPAM(0.00)[0.549]; DKIM_SIGNED(0.00)[]; RCPT_COUNT_TWELVE(0.00)[23]; MID_CONTAINS_FROM(1.00)[]; 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,walle.cc,arm.com]; SUSPICIOUS_RECIPS(1.50)[] X-Spam: Yes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200317_135051_244825_1184B182 X-CRM114-Status: GOOD ( 13.73 ) X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [176.9.125.105 listed in list.dnswl.org] 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marc Zyngier , Jean Delvare , Jason Cooper , Shawn Guo , Linus Walleij , Robin Murphy , Li Yang , Bartosz Golaszewski , Michael Walle , Rob Herring , Thierry Reding , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Thomas Gleixner , Wim Van Sebroeck , Lee Jones , Guenter Roeck Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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;