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iio: temp: maxim_thermocouple: 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: 1f25ca1 ("iio: temperature: add support for Maxim thermocouple chips")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Matt Ranostay <mranostay@gmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-93-jic23@kernel.org
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Jonathan Cameron authored and Jonathan Cameron committed Jun 14, 2022
1 parent ecdef5b commit 10897f3
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion drivers/iio/temperature/maxim_thermocouple.c
Original file line number Diff line number Diff line change
Expand Up @@ -122,7 +122,7 @@ struct maxim_thermocouple_data {
struct spi_device *spi;
const struct maxim_thermocouple_chip *chip;

u8 buffer[16] ____cacheline_aligned;
u8 buffer[16] __aligned(IIO_DMA_MINALIGN);
char tc_type;
};

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