This is a note to let you know that I've just added the patch titled iio: adc: ad7949: 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-ad7949-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 afe579b0def3600f5a2f640fee9e6515bfb76e4a Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Date: Sun May 8 18:55:59 2022 +0100 iio: adc: ad7949: Fix alignment for DMA safety [ Upstream commit 9c6c7eff7d4a53efd4d0818f8664259a1862665a ] ____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. Note the fixes tag predates some changes to this line of code so automated application of this fix may fail. Fixes: 7f40e0614317 ("iio:adc:ad7949: Add AD7949 ADC driver family") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Cc: Charles-Antoine Couret <charles-antoine.couret@xxxxxxxxxxxxx> Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220508175712.647246-20-jic23@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iio/adc/ad7949.c b/drivers/iio/adc/ad7949.c index 44bb5fde83de..ed4c1656ca75 100644 --- a/drivers/iio/adc/ad7949.c +++ b/drivers/iio/adc/ad7949.c @@ -86,7 +86,7 @@ struct ad7949_adc_chip { u8 resolution; u16 cfg; unsigned int current_channel; - u16 buffer ____cacheline_aligned; + u16 buffer __aligned(IIO_DMA_MINALIGN); __be16 buf8b; };