From: Jonathan Cameron Date: Sun, 8 May 2022 17:57:11 +0000 (+0100) Subject: iio: temp: max31865: Fix alignment for DMA safety X-Git-Tag: v6.1-rc5~726^2~26^2~62 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ecdef5b8317cdf18acb46223e087f04a226fa619;p=platform%2Fkernel%2Flinux-starfive.git iio: temp: max31865: Fix alignment for DMA safety ____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 --- diff --git a/drivers/iio/temperature/max31865.c b/drivers/iio/temperature/max31865.c index e3bb781..29e2365 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,