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iio: temp: max31865: Fix alignment for DMA safety

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____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: e112dc4e18 ("iio: temperature: Add MAX31865 RTD Support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Navin Sankar Velliangiri <navin@linumiz.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-92-jic23@kernel.org
This commit is contained in:
Jonathan Cameron
2022-05-08 18:57:11 +01:00
parent 732f2cb2fb
commit ecdef5b831
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/temperature/max31865.c
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@@ -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,