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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 18:56:38 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:17 +0100 |
| commit | 1c20292c6b60cfc60a5e652174b8063e5cc03fec (patch) | |
| tree | a97e9c9e48c027cbba3f0b24515d13f5febb502f /drivers/iio/dac | |
| parent | 69e51448ddfb9062efdf83e2d3179498e0aeb293 (diff) | |
| download | linux-1c20292c6b60cfc60a5e652174b8063e5cc03fec.tar.bz2 | |
iio: dac: ad8801: 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: 7f270bc9a2d9 ("iio: dac: AD8801: add Analog Devices AD8801/AD8803 support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-59-jic23@kernel.org
Diffstat (limited to 'drivers/iio/dac')
| -rw-r--r-- | drivers/iio/dac/ad8801.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/dac/ad8801.c b/drivers/iio/dac/ad8801.c index 6be35c92d435..919e8c880697 100644 --- a/drivers/iio/dac/ad8801.c +++ b/drivers/iio/dac/ad8801.c @@ -26,7 +26,7 @@ struct ad8801_state { struct regulator *vrefh_reg; struct regulator *vrefl_reg; - __be16 data ____cacheline_aligned; + __be16 data __aligned(IIO_DMA_MINALIGN); }; static int ad8801_spi_write(struct ad8801_state *state, |