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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        =?UTF-8?q?Nuno=20S=C3=A1?= <nuno.sa@analog.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.18 0654/1095] iio: frequency: admv4420: Fix alignment for DMA safety
Date:   Mon, 15 Aug 2022 20:00:53 +0200
Message-Id: <20220815180456.459835605@linuxfoundation.org>
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From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

[ Upstream commit f890aaac771bd015c348eddb967b4027e88344c0 ]

____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: b59c04155901 ("iio: frequency: admv4420.c: Add support for ADMV4420")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-71-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/iio/frequency/admv4420.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/frequency/admv4420.c b/drivers/iio/frequency/admv4420.c
index 51134aee8510..863ba8e98c95 100644
--- a/drivers/iio/frequency/admv4420.c
+++ b/drivers/iio/frequency/admv4420.c
@@ -113,7 +113,7 @@ struct admv4420_state {
 	struct admv4420_n_counter	n_counter;
 	enum admv4420_mux_sel		mux_sel;
 	struct mutex			lock;
-	u8				transf_buf[4] ____cacheline_aligned;
+	u8				transf_buf[4] __aligned(IIO_DMA_MINALIGN);
 };
 
 static const struct regmap_config admv4420_regmap_config = {
-- 
2.35.1