This is a note to let you know that I've just added the patch titled iio: resolver: ad2s90: 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-resolver-ad2s90-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 7ce9e452640ba6e5f503a0398223f111da864f50 Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Date: Sun May 8 18:57:09 2022 +0100 iio: resolver: ad2s90: Fix alignment for DMA safety [ Upstream commit faa05ecb1349070d874810e161b653c2220e0006 ] ____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 probably not where the issue was first introduced, but is likely to be far beyond the point where anyone considers backporting this fix. Fixes: 58f08b0af857 ("staging:iio:resolver:ad2s90 general cleanup") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220508175712.647246-90-jic23@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iio/resolver/ad2s90.c b/drivers/iio/resolver/ad2s90.c index d6a91f137e13..be6836e55376 100644 --- a/drivers/iio/resolver/ad2s90.c +++ b/drivers/iio/resolver/ad2s90.c @@ -24,7 +24,7 @@ struct ad2s90_state { struct mutex lock; /* lock to protect rx buffer */ struct spi_device *sdev; - u8 rx[2] ____cacheline_aligned; + u8 rx[2] __aligned(IIO_DMA_MINALIGN); }; static int ad2s90_read_raw(struct iio_dev *indio_dev,