This is a note to let you know that I've just added the patch titled
iio: adc: ad7292: Fix alignment for DMA safety
to the 5.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-adc-ad7292-fix-alignment-for-dma-safety.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e6f83c3715c1daf7d0ffa2bcbb9bc237f74bd9a8
Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Date: Sun May 8 18:55:51 2022 +0100
iio: adc: ad7292: Fix alignment for DMA safety
[ Upstream commit 98295a206d04633bae31f279de11ff7d04724bce ]
____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: 506d2e317a0a ("iio: adc: Add driver support for AD7292")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Acked-by: Marcelo Schmitt <marcelo.schmitt1@xxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-12-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iio/adc/ad7292.c b/drivers/iio/adc/ad7292.c
index 3271a31afde1..92c68d467c50 100644
--- a/drivers/iio/adc/ad7292.c
+++ b/drivers/iio/adc/ad7292.c
@@ -80,7 +80,7 @@ struct ad7292_state {
struct regulator *reg;
unsigned short vref_mv;
- __be16 d16 ____cacheline_aligned;
+ __be16 d16 __aligned(IIO_DMA_MINALIGN);
u8 d8[2];
};
