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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 18:57:12 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:19 +0100 |
| commit | 10897f34309b3c7bc14698407436c82d11c07f47 (patch) | |
| tree | 07daa230ac988e80d28b1468e29ba8ea2c1fbf9d /drivers/iio/temperature | |
| parent | ecdef5b8317cdf18acb46223e087f04a226fa619 (diff) | |
| download | lwn-10897f34309b3c7bc14698407436c82d11c07f47.tar.gz lwn-10897f34309b3c7bc14698407436c82d11c07f47.zip | |
iio: temp: maxim_thermocouple: 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: 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
Diffstat (limited to 'drivers/iio/temperature')
| -rw-r--r-- | drivers/iio/temperature/maxim_thermocouple.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/temperature/maxim_thermocouple.c b/drivers/iio/temperature/maxim_thermocouple.c index 98c41cddc6f0..c28a7a6dea5f 100644 --- a/drivers/iio/temperature/maxim_thermocouple.c +++ b/drivers/iio/temperature/maxim_thermocouple.c @@ -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; }; |