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iio: temp: maxim_thermocouple: Fix alignment for DMA safety

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[ Upstream commit 10897f34309b3c7bc14698407436c82d11c07f47 ]

____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: 1f25ca11d84a ("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
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2022-05-08 18:57:12 +01:00 committed by Greg Kroah-Hartman
parent 4f7a71a85c
commit 4fe070b5d5
1 changed files with 1 additions and 1 deletions
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drivers/iio/temperature/maxim_thermocouple.c
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@ -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;
};