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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 18:57:02 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:19 +0100 |
| commit | ec1ac1c0e7a14657d729159ccfbea72f434bdaf1 (patch) | |
| tree | 45c65d740a554cc6e9160883d1773b15e109a0da | |
| parent | da803652534271dbb4af0802bd678c759e27e6de (diff) | |
| download | linux-ec1ac1c0e7a14657d729159ccfbea72f434bdaf1.tar.bz2 | |
iio: potentiometer: max5481: 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: df1fd2de118e ("iio: max5481: Add support for Maxim digital potentiometers")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-83-jic23@kernel.org
| -rw-r--r-- | drivers/iio/potentiometer/max5481.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/potentiometer/max5481.c b/drivers/iio/potentiometer/max5481.c index 098d144a8fdd..b40e5ac218d7 100644 --- a/drivers/iio/potentiometer/max5481.c +++ b/drivers/iio/potentiometer/max5481.c @@ -44,7 +44,7 @@ static const struct max5481_cfg max5481_cfg[] = { struct max5481_data { struct spi_device *spi; const struct max5481_cfg *cfg; - u8 msg[3] ____cacheline_aligned; + u8 msg[3] __aligned(IIO_DMA_MINALIGN); }; #define MAX5481_CHANNEL { \ |