Commit ecdef5b8 authored by Jonathan Cameron's avatar Jonathan Cameron
Browse files

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: e112dc4e ("iio: temperature: Add MAX31865 RTD Support")
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Navin Sankar Velliangiri <navin@linumiz.com>
Acked-by: default avatarNuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-92-jic23@kernel.org
parent 732f2cb2

drivers/iio/temperature/max31865.c

+1 −1
Original line number Diff line number Diff line
@@ -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,