From 9d7019e43ee67a48cef63f8f23f002233064d390 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Sun, 8 May 2022 18:56:06 +0100
Subject: [PATCH] iio: adc: max1241: Fix alignment for DMA safety
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Git-commit: 9d7019e43ee67a48cef63f8f23f002233064d390
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: 8a80a71d9020 ("iio: adc: Add MAX1241 driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Alexandru Lazar <alazar@startmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-27-jic23@kernel.org
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/iio/adc/max1241.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/adc/max1241.c b/drivers/iio/adc/max1241.c
index a5afd84af58b..a815ad1f6913 100644
--- a/drivers/iio/adc/max1241.c
+++ b/drivers/iio/adc/max1241.c
@@ -26,7 +26,7 @@ struct max1241 {
struct regulator *vref;
struct gpio_desc *shutdown;
- __be16 data ____cacheline_aligned;
+ __be16 data __aligned(IIO_DMA_MINALIGN);
};
static const struct iio_chan_spec max1241_channels[] = {
--
2.35.3