From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Sun, 8 May 2022 17:56:54 +0000 (+0100)
Subject: iio: gyro: adxrs450: Fix alignment for DMA safety
X-Git-Tag: v5.18.18~439
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4b061d4cf012df129d7ea71886e1c437dae980da;p=thirdparty%2Fkernel%2Fstable.git

iio: gyro: adxrs450: Fix alignment for DMA safety

[ Upstream commit 966d2f4ee7f6e189df47abf67223266ad31e201f ]

____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 tag is inaccurate but unlikely anyone will be interested in
backporting beyond that point.

Fixes: 53ac8500ba9b ("staging:iio:adxrs450: Move header file contents to main file")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-75-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/iio/gyro/adxrs450.c b/drivers/iio/gyro/adxrs450.c
index 04f3500252152..f84438e0c42c5 100644
--- a/drivers/iio/gyro/adxrs450.c
+++ b/drivers/iio/gyro/adxrs450.c
@@ -73,7 +73,7 @@ enum {
 struct adxrs450_state {
 	struct spi_device	*us;
 	struct mutex		buf_lock;
-	__be32			tx ____cacheline_aligned;
+	__be32			tx __aligned(IIO_DMA_MINALIGN);
 	__be32			rx;
 
 };