From ecdef5b8317cdf18acb46223e087f04a226fa619 Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Sun, 8 May 2022 18:57:11 +0100 Subject: [PATCH] iio: temp: max31865: Fix alignment for DMA safety MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit ____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: e112dc4e18ea ("iio: temperature: Add MAX31865 RTD Support") Signed-off-by: Jonathan Cameron Cc: Navin Sankar Velliangiri Acked-by: Nuno Sá Link: https://lore.kernel.org/r/20220508175712.647246-92-jic23@kernel.org --- drivers/iio/temperature/max31865.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/temperature/max31865.c b/drivers/iio/temperature/max31865.c index e3bb78184c6e..29e23652ba5a 100644 --- a/drivers/iio/temperature/max31865.c +++ b/drivers/iio/temperature/max31865.c @@ -55,7 +55,7 @@ struct max31865_data { struct mutex lock; bool filter_50hz; bool three_wire; - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; static int max31865_read(struct max31865_data *data, u8 reg,