This is a note to let you know that I've just added the patch titled iio: dac: ad5761: 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-dac-ad5761-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 d9b0fd012e2554615badbee713133f32c111aecf Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Date: Sun May 8 18:56:31 2022 +0100 iio: dac: ad5761: Fix alignment for DMA safety [ Upstream commit 7d12a61187aed57863c41032acbc1fae516d6e49 ] ____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. Update the comment to include 'may'. Fixes: 131497acd88a ("iio: add ad5761 DAC driver") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220508175712.647246-52-jic23@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iio/dac/ad5761.c b/drivers/iio/dac/ad5761.c index 4cb8471db81e..6aa1a068adb0 100644 --- a/drivers/iio/dac/ad5761.c +++ b/drivers/iio/dac/ad5761.c @@ -70,13 +70,13 @@ struct ad5761_state { enum ad5761_voltage_range range; /* - * DMA (thus cache coherency maintenance) requires the + * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. */ union { __be32 d32; u8 d8[4]; - } data[3] ____cacheline_aligned; + } data[3] __aligned(IIO_DMA_MINALIGN); }; static const struct ad5761_range_params ad5761_range_params[] = {