From ec1ac1c0e7a14657d729159ccfbea72f434bdaf1 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Sun, 8 May 2022 18:57:02 +0100
Subject: [PATCH] iio: potentiometer: max5481: Fix alignment for DMA safety
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Git-commit: ec1ac1c0e7a14657d729159ccfbea72f434bdaf1
Patch-mainline: v6.0-rc1
References: git-fixes
____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: df1fd2de118e ("iio: max5481: Add support for Maxim digital potentiometers")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-83-jic23@kernel.org
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/iio/potentiometer/max5481.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/potentiometer/max5481.c b/drivers/iio/potentiometer/max5481.c
index 098d144a8fdd..b40e5ac218d7 100644
--- a/drivers/iio/potentiometer/max5481.c
+++ b/drivers/iio/potentiometer/max5481.c
@@ -44,7 +44,7 @@ static const struct max5481_cfg max5481_cfg[] = {
struct max5481_data {
struct spi_device *spi;
const struct max5481_cfg *cfg;
- u8 msg[3] ____cacheline_aligned;
+ u8 msg[3] __aligned(IIO_DMA_MINALIGN);
};
#define MAX5481_CHANNEL { \
--
2.35.3