[PATCH v2 63/92] iio: dac: ti-dac7311: Fix alignment for DMA safety

From: Jonathan Cameron <jic23@kernel.org>
To: linux-iio@vger.kernel.org
Cc: "Alexandru Lazar" <alazar@startmail.com>,
	"Akinobu Mita" <akinobu.mita@gmail.com>,
	"Alexandru Tachici" <alexandru.tachici@analog.com>,
	"Antoniu Miclaus" <antoniu.miclaus@analog.com>,
	"Charles-Antoine Couret" <charles-antoine.couret@essensium.com>,
	"Cosmin Tanislav" <cosmin.tanislav@analog.com>,
	"David Lechner" <david@lechnology.com>,
	"Ivan Mikhaylov" <i.mikhaylov@yadro.com>,
	"Jacopo Mondi" <jacopo+renesas@jmondi.org>,
	"Jean-Baptiste Maneyrol" <jmaneyrol@invensense.com>,
	"Lars-Peter Clausen" <lars@metafoo.de>,
	"Marcelo Schmitt" <marcelo.schmitt1@gmail.com>,
	"Mårten Lindahl" <martenli@axis.com>,
	"Matt Ranostay" <mranostay@gmail.com>,
	"Matt Ranostay" <matt.ranostay@konsulko.com>,
	"Michael Hennerich" <michael.hennerich@analog.com>,
	"Michael Welling" <mwelling@ieee.org>,
	"Mugilraj Dhavachelvan" <dmugil2000@gmail.com>,
	"Navin Sankar Velliangiri" <navin@linumiz.com>,
	"Nuno Sá" <nuno.sa@analog.com>,
	"Paul Cercueil" <paul@crapouillou.net>,
	"Phil Reid" <preid@electromag.com.au>,
	"Puranjay Mohan" <puranjay12@gmail.com>,
	"Ricardo Ribalda" <ribalda@kernel.org>,
	"Robert Jones" <rjones@gateworks.com>,
	"Rui Miguel Silva" <rui.silva@linaro.org>,
	"Sean Nyekjaer" <sean.nyekjaer@prevas.dk>,
	"Tomas Melin" <tomas.melin@vaisala.com>,
	"Tomislav Denis" <tomislav.denis@avl.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Jonathan Cameron" <Jonathan.Cameron@huawei.com>
Subject: [PATCH v2 63/92] iio: dac: ti-dac7311: Fix alignment for DMA safety
Date: Sun,  8 May 2022 18:56:43 +0100	[thread overview]
Message-ID: <20220508175712.647246-64-jic23@kernel.org> (raw)
In-Reply-To: <20220508175712.647246-1-jic23@kernel.org>

From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

____cacheline_aligned is an insufficient guarantee for non-coherent DMA
on platforms with 128 byte cachelines above L1.  Switch to the updated
IIO_DMA_MINALIGN definition.

Fixes: 7a02ef7907d8 ("iio:dac:ti-dac7311 Add driver for Texas Instrument DAC7311")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Charles-Antoine Couret <charles-antoine.couret@essensium.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/dac/ti-dac7311.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/dac/ti-dac7311.c b/drivers/iio/dac/ti-dac7311.c
index e10d17e60ed3..dd0a7b77838d 100644
--- a/drivers/iio/dac/ti-dac7311.c
+++ b/drivers/iio/dac/ti-dac7311.c
@@ -52,7 +52,7 @@ struct ti_dac_chip {
 	bool powerdown;
 	u8 powerdown_mode;
 	u8 resolution;
-	u8 buf[2] ____cacheline_aligned;
+	u8 buf[2] __aligned(IIO_DMA_MINALIGN);
 };
 
 static u8 ti_dac_get_power(struct ti_dac_chip *ti_dac, bool powerdown)
-- 
2.36.0

