linux-kernel - [PATCH 5.18 0615/1095] iio: adc: ti-adc12138: Fix alignment for DMA safety

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Message-Id: <20220815180454.943364212@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 20:00:14 +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 5.18 0615/1095] iio: adc: ti-adc12138: Fix alignment for DMA safety

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

[ Upstream commit 76890c3bce6003caf53b283c49a210280cb8ea33 ]

____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: 50a6edb1b6e0 ("iio: adc: add ADC12130/ADC12132/ADC12138 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/20220508175712.647246-32-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iio/adc/ti-adc12138.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ti-adc12138.c b/drivers/iio/adc/ti-adc12138.c
index 59d75d09604f..c0a72d72f3a9 100644
--- a/drivers/iio/adc/ti-adc12138.c
+++ b/drivers/iio/adc/ti-adc12138.c
@@ -55,7 +55,7 @@ struct adc12138 {
 	 */
 	__be16 data[20] __aligned(8);
 
-	u8 tx_buf[2] ____cacheline_aligned;
+	u8 tx_buf[2] __aligned(IIO_DMA_MINALIGN);
 	u8 rx_buf[2];
 };
 
-- 
2.35.1