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From: Michael Walle <michael@walle.cc>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	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" <linus.walleij@linaro.org>,
	"Bartosz Golaszewski" <bgolaszewski@baylibre.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Jean Delvare" <jdelvare@suse.com>,
	"Guenter Roeck" <linux@roeck-us.net>,
	"Lee Jones" <lee.jones@linaro.org>,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Wim Van Sebroeck" <wim@linux-watchdog.org>,
	"Shawn Guo" <shawnguo@kernel.org>, "Li Yang" <leoyang.li@nxp.com>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Jason Cooper" <jason@lakedaemon.net>,
	"Marc Zyngier" <maz@kernel.org>,
	"Mark Brown" <broonie@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Michael Walle" <michael@walle.cc>,
	"Robin Murphy" <robin.murphy@arm.com>
Subject: [PATCH v3 02/16] mfd: mfd-core: Don't overwrite the dma_mask of the child device
Date: Thu, 23 Apr 2020 19:45:29 +0200	[thread overview]
Message-ID: <20200423174543.17161-3-michael@walle.cc> (raw)
In-Reply-To: <20200423174543.17161-1-michael@walle.cc>

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 <michael@walle.cc>
Suggested-by: Robin Murphy <robin.murphy@arm.com>
---
 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


  parent reply	other threads:[~2020-04-23 17:47 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-23 17:45 [PATCH v3 00/16] Add support for Kontron sl28cpld Michael Walle
2020-04-23 17:45 ` [PATCH v3 01/16] include/linux/ioport.h: add helper to define REG resource constructs Michael Walle
2020-04-23 17:45 ` Michael Walle [this message]
2020-04-28 12:45   ` [PATCH v3 02/16] mfd: mfd-core: Don't overwrite the dma_mask of the child device Andy Shevchenko
2020-04-28 13:06     ` Robin Murphy
2020-04-28 14:29       ` Andy Shevchenko
2020-04-28 14:49         ` Robin Murphy
2020-04-28 15:25           ` Mark Brown
2020-05-14 20:45             ` Michael Walle
2020-04-23 17:45 ` [PATCH v3 03/16] mfd: mfd-core: match device tree node against reg property Michael Walle
2020-04-29 22:18   ` Michael Walle
2020-05-15 10:28     ` Lee Jones
2020-05-25 17:36       ` Michael Walle
2020-05-26  7:24         ` Lee Jones
2020-05-26 15:54           ` Michael Walle
2020-05-26 16:03             ` Andy Shevchenko
2020-05-27  6:53               ` Lee Jones
2020-06-08 14:24         ` Lee Jones
2020-06-08 15:21           ` Michael Walle
2020-06-08 18:45             ` Lee Jones
2020-04-23 17:45 ` [PATCH v3 04/16] dt-bindings: mfd: Add bindings for sl28cpld Michael Walle
2020-04-28 12:48   ` Andy Shevchenko
2020-04-28 14:39     ` Michael Walle
2020-04-28 14:49       ` Andy Shevchenko
2020-04-23 17:45 ` [PATCH v3 05/16] mfd: Add support for Kontron sl28cpld management controller Michael Walle
2020-04-28 12:50   ` Andy Shevchenko
2020-04-28 14:43     ` Michael Walle
2020-04-28 14:49       ` Andy Shevchenko
2020-04-29  6:27         ` Lee Jones
2020-05-11 21:13   ` Rob Herring
2020-05-11 21:44     ` Michael Walle
2020-05-11 22:29       ` Michael Walle
2020-05-12 21:59       ` Rob Herring
2020-05-13 22:15         ` Michael Walle
2020-04-23 17:45 ` [PATCH v3 06/16] irqchip: add sl28cpld interrupt controller support Michael Walle
2020-04-27 11:40   ` Thomas Gleixner
2020-04-27 17:40     ` Michael Walle
2020-04-27 17:44       ` Mark Brown
2020-04-27 18:01         ` Michael Walle
2020-04-27 18:05           ` Mark Brown
2020-04-27 19:00       ` Thomas Gleixner
2020-04-23 17:45 ` [PATCH v3 07/16] watchdog: add support for sl28cpld watchdog Michael Walle
2020-04-25 17:02   ` Guenter Roeck
2020-04-23 17:45 ` [PATCH v3 08/16] pwm: add support for sl28cpld PWM controller Michael Walle
2020-05-11 20:45   ` Rob Herring
2020-04-23 17:45 ` [PATCH v3 09/16] gpiolib: Introduce gpiochip_irqchip_add_domain() Michael Walle
2020-04-27 11:42   ` Thomas Gleixner
2020-04-27 17:49     ` Michael Walle
2020-04-23 17:45 ` [PATCH v3 10/16] gpio: add a reusable generic gpio_chip using regmap Michael Walle
2020-05-12 12:48   ` Bartosz Golaszewski
2020-05-12 14:41     ` Michael Walle
2020-05-25  9:05       ` Bartosz Golaszewski
2020-05-25 10:20         ` Michael Walle
2020-05-25 12:59           ` Linus Walleij
2020-05-25 13:25             ` Andy Shevchenko
2020-04-23 17:45 ` [PATCH v3 11/16] gpio: add support for the sl28cpld GPIO controller Michael Walle
2020-04-27 11:45   ` Thomas Gleixner
2020-04-27 17:58     ` Michael Walle
2020-04-23 17:45 ` [PATCH v3 12/16] hwmon: add support for the sl28cpld hardware monitoring controller Michael Walle
2020-04-23 17:45 ` [PATCH v3 13/16] arm64: dts: freescale: sl28: enable sl28cpld Michael Walle
2020-04-23 17:45 ` [PATCH v3 14/16] arm64: dts: freescale: sl28: map GPIOs to input events Michael Walle
2020-04-23 17:45 ` [PATCH v3 15/16] arm64: dts: freescale: sl28: enable LED support Michael Walle
2020-04-23 17:45 ` [PATCH v3 16/16] arm64: dts: freescale: sl28: enable fan support Michael Walle

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