This is a note to let you know that I've just added the patch titled
iio: proximity: as3935: 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-proximity-as3935-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 598f808d7bf606cef67b4b57fc148947b8d64645
Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Date: Sun May 8 18:57:06 2022 +0100
iio: proximity: as3935: Fix alignment for DMA safety
[ Upstream commit 2386c0f8c5b740873a4b9126c3706601b127fe22 ]
____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@xxxxxxxxxx>
Cc: Matt Ranostay <mranostay@xxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-87-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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[] = {
