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iio: potentiometer: ad5272: 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: 79e8a32d2a ("iio: ad5272: Add support for Analog Devices digital potentiometers")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Phil Reid <preid@electromag.com.au>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-82-jic23@kernel.org
This commit is contained in:
Jonathan Cameron 2022-05-08 18:57:01 +01:00
parent b5841c38cb
commit da80365253
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/potentiometer/ad5272.c
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@ -50,7 +50,7 @@ struct ad5272_data {
struct i2c_client *client;
struct mutex lock;
const struct ad5272_cfg *cfg;
u8 buf[2] ____cacheline_aligned;
u8 buf[2] __aligned(IIO_DMA_MINALIGN);
};
static const struct iio_chan_spec ad5272_channel = {