linux-kernel - [PATCH 5.18 0658/1095] iio: gyro: adxrs450: Fix alignment for DMA safety

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Date:   Mon, 15 Aug 2022 20:00:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0658/1095] iio: gyro: adxrs450: Fix alignment for DMA safety

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

[ 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@...wei.com>
Acked-by: Nuno Sá <nuno.sa@...log.com>
Link: https://lore.kernel.org/r/20220508175712.647246-75-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iio/gyro/adxrs450.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/gyro/adxrs450.c b/drivers/iio/gyro/adxrs450.c
index 04f350025215..f84438e0c42c 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;
 
 };
-- 
2.35.1