From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Sun, 8 May 2022 17:56:03 +0000 (+0100)
Subject: iio: adc: max1027: Fix alignment for DMA safety
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e754fb7e7a05e3838c9aa044b4114869dd0d1e17;p=linux.git

iio: adc: max1027: Fix alignment for DMA safety

____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: fc167f624833 ("iio: add support of the max1027")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-24-jic23@kernel.org
---

diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index 4daf1d576c4ee..b725d012625c1 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -272,7 +272,7 @@ struct max1027_state {
 	struct mutex			lock;
 	struct completion		complete;
 
-	u8				reg ____cacheline_aligned;
+	u8				reg __aligned(IIO_DMA_MINALIGN);
 };
 
 static int max1027_wait_eoc(struct iio_dev *indio_dev)