diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 18:57:00 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:19 +0100 |
| commit | b5841c38cb2f7e54b0787b3e0326a6b21b89ea3e (patch) | |
| tree | 64664b13b76e09d1669eeed907361ed60808995b /drivers/iio/potentiometer | |
| parent | 54e03562bb960e78af050d2e550c28d77642ee44 (diff) | |
iio: potentiometer: ad5110: 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: d03a74bfacce ("iio: potentiometer: Add driver support for AD5110")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Mugilraj Dhavachelvan <dmugil2000@gmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-81-jic23@kernel.org
Diffstat (limited to 'drivers/iio/potentiometer')
| -rw-r--r-- | drivers/iio/potentiometer/ad5110.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/potentiometer/ad5110.c b/drivers/iio/potentiometer/ad5110.c index d4eeedae56e5..8fbcce482989 100644 --- a/drivers/iio/potentiometer/ad5110.c +++ b/drivers/iio/potentiometer/ad5110.c @@ -63,10 +63,10 @@ struct ad5110_data { struct mutex lock; const struct ad5110_cfg *cfg; /* - * DMA (thus cache coherency maintenance) requires the + * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. */ - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; static const struct iio_chan_spec ad5110_channels[] = { |