This is a note to let you know that I've just added the patch titled iio: resolver: ad2s1200: 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-ad2s1200-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 c4f517edfa9bcd5efd06bf6c7c61de659633b280 Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Date: Sun May 8 18:57:08 2022 +0100 iio: resolver: ad2s1200: Fix alignment for DMA safety [ Upstream commit 37882314d3bdc2ae775ebb9fa8ed7a94cd1aad61 ] ____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 as far as anyone considers backporting this fix. Fixes: 0bd3d338f61b ("staging: iio: ad2s1200: Improve readability with be16_to_cpup") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220508175712.647246-89-jic23@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iio/resolver/ad2s1200.c b/drivers/iio/resolver/ad2s1200.c index 9746bd935628..9d95241bdf8f 100644 --- a/drivers/iio/resolver/ad2s1200.c +++ b/drivers/iio/resolver/ad2s1200.c @@ -41,7 +41,7 @@ struct ad2s1200_state { struct spi_device *sdev; struct gpio_desc *sample; struct gpio_desc *rdvel; - __be16 rx ____cacheline_aligned; + __be16 rx __aligned(IIO_DMA_MINALIGN); }; static int ad2s1200_read_raw(struct iio_dev *indio_dev,