This is a note to let you know that I've just added the patch titled
iio: adc: max1027: 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-max1027-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 243b10ba4c7c37896ab07af1611f41b24cd5536f
Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Date: Sun May 8 18:56:03 2022 +0100
iio: adc: max1027: Fix alignment for DMA safety
[ Upstream commit e754fb7e7a05e3838c9aa044b4114869dd0d1e17 ]
____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: fc167f624833 ("iio: add support of the max1027")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-24-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index 4daf1d576c4e..b725d012625c 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -272,7 +272,7 @@ struct max1027_state {
struct mutex lock;
struct completion complete;
- u8 reg ____cacheline_aligned;
+ u8 reg __aligned(IIO_DMA_MINALIGN);
};
static int max1027_wait_eoc(struct iio_dev *indio_dev)
