This is a note to let you know that I've just added the patch titled
iio: adc: max1118: 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-max1118-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 807b84f9342026fb1d16c6d4abe72a99d89eee3f
Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Date: Sun May 8 18:56:05 2022 +0100
iio: adc: max1118: Fix alignment for DMA safety
[ Upstream commit f746ab0bac5b335b09143dcd01db6f9f26d0c9ec ]
____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: a9e9c7153e96 ("iio: adc: add max1117/max1118/max1119 ADC driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Cc: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-26-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iio/adc/max1118.c b/drivers/iio/adc/max1118.c
index a41bc570be21..75ab57d9aef7 100644
--- a/drivers/iio/adc/max1118.c
+++ b/drivers/iio/adc/max1118.c
@@ -42,7 +42,7 @@ struct max1118 {
s64 ts __aligned(8);
} scan;
- u8 data ____cacheline_aligned;
+ u8 data __aligned(IIO_DMA_MINALIGN);
};
#define MAX1118_CHANNEL(ch) \
