linux-kernel - [PATCH 5.18 0595/1095] iio: adc: ad7292: Fix alignment for DMA safety

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Message-Id: <20220815180454.164862407@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:59:54 +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>,
        Marcelo Schmitt <marcelo.schmitt1@...il.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0595/1095] iio: adc: ad7292: Fix alignment for DMA safety

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

[ Upstream commit 98295a206d04633bae31f279de11ff7d04724bce ]

____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: 506d2e317a0a ("iio: adc: Add driver support for AD7292")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Acked-by: Marcelo Schmitt <marcelo.schmitt1@...il.com>
Acked-by: Nuno Sá <nuno.sa@...log.com>
Link: https://lore.kernel.org/r/20220508175712.647246-12-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iio/adc/ad7292.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ad7292.c b/drivers/iio/adc/ad7292.c
index 3271a31afde1..92c68d467c50 100644
--- a/drivers/iio/adc/ad7292.c
+++ b/drivers/iio/adc/ad7292.c
@@ -80,7 +80,7 @@ struct ad7292_state {
 	struct regulator *reg;
 	unsigned short vref_mv;
 
-	__be16 d16 ____cacheline_aligned;
+	__be16 d16 __aligned(IIO_DMA_MINALIGN);
 	u8 d8[2];
 };
 
-- 
2.35.1