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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 18:57:11 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:19 +0100 |
| commit | ecdef5b8317cdf18acb46223e087f04a226fa619 (patch) | |
| tree | cf300c62bc46387ad3b9921831645fa4b96b3f53 | |
| parent | 732f2cb2fbb51bd5bc03a114bd102ab3b2f537fe (diff) | |
| download | lwn-ecdef5b8317cdf18acb46223e087f04a226fa619.tar.gz lwn-ecdef5b8317cdf18acb46223e087f04a226fa619.zip | |
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: e112dc4e18ea ("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
| -rw-r--r-- | drivers/iio/temperature/max31865.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/temperature/max31865.c b/drivers/iio/temperature/max31865.c index e3bb78184c6e..29e23652ba5a 100644 --- a/drivers/iio/temperature/max31865.c +++ b/drivers/iio/temperature/max31865.c @@ -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, |