linux-kernel - [PATCH 5.18 0657/1095] iio: gyro: adis16130: Fix alignment for DMA safety

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Message-Id: <20220815180456.575004793@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 20:00:56 +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 0657/1095] iio: gyro: adis16130: Fix alignment for DMA safety

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

[ Upstream commit ff3211b2ba9afac80ceb795d148831dd879b30b7 ]

____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: 8e67875141b2 ("staging:iio:gyro: adis16130 cleanup, move to abi and bug fixes.")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Acked-by: Nuno Sá <nuno.sa@...log.com>
Link: https://lore.kernel.org/r/20220508175712.647246-74-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iio/gyro/adis16130.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/gyro/adis16130.c b/drivers/iio/gyro/adis16130.c
index b9c952e65b55..33cde9e6fca5 100644
--- a/drivers/iio/gyro/adis16130.c
+++ b/drivers/iio/gyro/adis16130.c
@@ -41,7 +41,7 @@
 struct adis16130_state {
 	struct spi_device		*us;
 	struct mutex			buf_lock;
-	u8				buf[4] ____cacheline_aligned;
+	u8				buf[4] __aligned(IIO_DMA_MINALIGN);
 };
 
 static int adis16130_spi_read(struct iio_dev *indio_dev, u8 reg_addr, u32 *val)
-- 
2.35.1