This is a note to let you know that I've just added the patch titled
iio: gyro: adis16080: 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-gyro-adis16080-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 46f094f3ce801f0d05ab0b0f7cfc5e39b45402bb
Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Date: Sun May 8 18:56:52 2022 +0100
iio: gyro: adis16080: Fix alignment for DMA safety
[ Upstream commit ae6eeb534924ecc2afd5a394964fd6de0ca54d39 ]
____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 tag is inaccurate but unlikely anyone will backport this
beyond that point so I haven't chased the history futher than 2013.
Fixes: 3c80372dae17 ("staging:iio:adis16080: be16 cleanups")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-73-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iio/gyro/adis16080.c b/drivers/iio/gyro/adis16080.c
index acef59d822b1..14b3abf6dce9 100644
--- a/drivers/iio/gyro/adis16080.c
+++ b/drivers/iio/gyro/adis16080.c
@@ -45,7 +45,7 @@ struct adis16080_state {
const struct adis16080_chip_info *info;
struct mutex lock;
- __be16 buf ____cacheline_aligned;
+ __be16 buf __aligned(IIO_DMA_MINALIGN);
};
static int adis16080_read_sample(struct iio_dev *indio_dev,
