This is a note to let you know that I've just added the patch titled iio: dac: ti-dac5571: 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-ti-dac5571-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 7211f853d1db4182ad452576c326ed6b0c0cd626 Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Date: Sun May 8 18:56:42 2022 +0100 iio: dac: ti-dac5571: Fix alignment for DMA safety [ Upstream commit 58e22371539e01c742be5c30295f591a6a17e348 ] ____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: df38a4a72a3b ("iio: dac: add TI DAC5571 family support") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Cc: Sean Nyekjaer <sean.nyekjaer@xxxxxxxxx> Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220508175712.647246-63-jic23@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iio/dac/ti-dac5571.c b/drivers/iio/dac/ti-dac5571.c index 0b775f943db3..ba68ea1e3455 100644 --- a/drivers/iio/dac/ti-dac5571.c +++ b/drivers/iio/dac/ti-dac5571.c @@ -52,7 +52,7 @@ struct dac5571_data { struct dac5571_spec const *spec; int (*dac5571_cmd)(struct dac5571_data *data, int channel, u16 val); int (*dac5571_pwrdwn)(struct dac5571_data *data, int channel, u8 pwrdwn); - u8 buf[3] ____cacheline_aligned; + u8 buf[3] __aligned(IIO_DMA_MINALIGN); }; #define DAC5571_POWERDOWN(mode) ((mode) + 1)