This is a note to let you know that I've just added the patch titled iio: temp: maxim_thermocouple: 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-temp-maxim_thermocouple-fix-alignment-for-dma-sa.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 85f63b6dcc16c3d502a045f085314f1827b7d8c0 Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Date: Sun May 8 18:57:12 2022 +0100 iio: temp: maxim_thermocouple: Fix alignment for DMA safety [ Upstream commit 10897f34309b3c7bc14698407436c82d11c07f47 ] ____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: 1f25ca11d84a ("iio: temperature: add support for Maxim thermocouple chips") 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/20220508175712.647246-93-jic23@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iio/temperature/maxim_thermocouple.c b/drivers/iio/temperature/maxim_thermocouple.c index 98c41cddc6f0..c28a7a6dea5f 100644 --- a/drivers/iio/temperature/maxim_thermocouple.c +++ b/drivers/iio/temperature/maxim_thermocouple.c @@ -122,7 +122,7 @@ struct maxim_thermocouple_data { struct spi_device *spi; const struct maxim_thermocouple_chip *chip; - u8 buffer[16] ____cacheline_aligned; + u8 buffer[16] __aligned(IIO_DMA_MINALIGN); char tc_type; };