linux-kernel - [PATCH 5.19 0654/1157] iio: adc: max1118: Fix alignment for DMA safety

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Message-Id: <20220815180505.906251258@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 20:00:10 +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>,
        Akinobu Mita <akinobu.mita@...il.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 0654/1157] iio: adc: max1118: Fix alignment for DMA safety

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

[ Upstream commit f746ab0bac5b335b09143dcd01db6f9f26d0c9ec ]

____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: a9e9c7153e96 ("iio: adc: add max1117/max1118/max1119 ADC driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: Akinobu Mita <akinobu.mita@...il.com>
Acked-by: Nuno Sá <nuno.sa@...log.com>
Link: https://lore.kernel.org/r/20220508175712.647246-26-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iio/adc/max1118.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/max1118.c b/drivers/iio/adc/max1118.c
index a41bc570be21..75ab57d9aef7 100644
--- a/drivers/iio/adc/max1118.c
+++ b/drivers/iio/adc/max1118.c
@@ -42,7 +42,7 @@ struct max1118 {
 		s64 ts __aligned(8);
 	} scan;
 
-	u8 data ____cacheline_aligned;
+	u8 data __aligned(IIO_DMA_MINALIGN);
 };
 
 #define MAX1118_CHANNEL(ch)						\
-- 
2.35.1