From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Sun, 8 May 2022 17:56:36 +0000 (+0100)
Subject: iio: dac: ad7293: Fix alignment for DMA safety
X-Git-Tag: v5.18.18~457
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c39b62e83572ee5b46e5eaefa07a6af32be9ec2;p=thirdparty%2Fkernel%2Fstable.git

iio: dac: ad7293: Fix alignment for DMA safety

[ Upstream commit 8482468b30bdb16d4a764f995d7a63d94fa0cf40 ]

____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: 0bb12606c05f ("iio:dac:ad7293: add support for AD7293")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Antoniu Miclaus <antoniu.miclaus@analog.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-57-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/iio/dac/ad7293.c b/drivers/iio/dac/ad7293.c
index 59a38ca4c3c77..06f05750d9216 100644
--- a/drivers/iio/dac/ad7293.c
+++ b/drivers/iio/dac/ad7293.c
@@ -144,7 +144,7 @@ struct ad7293_state {
 	struct regulator *reg_avdd;
 	struct regulator *reg_vdrive;
 	u8 page_select;
-	u8 data[3] ____cacheline_aligned;
+	u8 data[3] __aligned(IIO_DMA_MINALIGN);
 };
 
 static int ad7293_page_select(struct ad7293_state *st, unsigned int reg)