From 2386c0f8c5b740873a4b9126c3706601b127fe22 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Sun, 8 May 2022 18:57:06 +0100
Subject: [PATCH] iio: proximity: as3935: Fix alignment for DMA safety
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Git-commit: 2386c0f8c5b740873a4b9126c3706601b127fe22
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: 24ddb0e4bba4 ("iio: Add AS3935 lightning sensor support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Matt Ranostay <mranostay@gmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-87-jic23@kernel.org
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/iio/proximity/as3935.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/proximity/as3935.c b/drivers/iio/proximity/as3935.c
index 67891ce2bd09..ebc95cf8f5f4 100644
--- a/drivers/iio/proximity/as3935.c
+++ b/drivers/iio/proximity/as3935.c
@@ -65,7 +65,7 @@ struct as3935_state {
u8 chan;
s64 timestamp __aligned(8);
} scan;
- u8 buf[2] ____cacheline_aligned;
+ u8 buf[2] __aligned(IIO_DMA_MINALIGN);
};
static const struct iio_chan_spec as3935_channels[] = {
--
2.35.3