linux-kernel - [PATCH 5.18 0655/1095] iio: frequency: adrf6780: Fix alignment for DMA safety

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Message-Id: <20220815180456.500462919@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 20:00:54 +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>,
        Antoniu Miclaus <antoniu.miclaus@...log.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0655/1095] iio: frequency: adrf6780: Fix alignment for DMA safety

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

[ Upstream commit 9a5b11884cb72780cb824cac8aab47094654a84f ]

____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: 63aaf6d06d87 ("iio: frequency: adrf6780: add support for ADRF6780")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: Antoniu Miclaus <antoniu.miclaus@...log.com>
Acked-by: Nuno Sá <nuno.sa@...log.com>
Link: https://lore.kernel.org/r/20220508175712.647246-72-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iio/frequency/adrf6780.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/frequency/adrf6780.c b/drivers/iio/frequency/adrf6780.c
index 8255ffd174f6..21878bad0909 100644
--- a/drivers/iio/frequency/adrf6780.c
+++ b/drivers/iio/frequency/adrf6780.c
@@ -86,7 +86,7 @@ struct adrf6780_state {
 	bool			uc_bias_en;
 	bool			lo_sideband;
 	bool			vdet_out_en;
-	u8			data[3] ____cacheline_aligned;
+	u8			data[3] __aligned(IIO_DMA_MINALIGN);
 };
 
 static int __adrf6780_spi_read(struct adrf6780_state *st, unsigned int reg,
-- 
2.35.1