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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 20:56:21 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 13:53:15 +0300 |
| commit | 026bffa458d029a5f15ac3f82a9bb0f64aca403d (patch) | |
| tree | 2a58c8b39764a6c046be95b29f1b3490cef514eb /drivers | |
| parent | 00eb2b8a077062557772234019ecd6045b8b6298 (diff) | |
| download | linux-026bffa458d029a5f15ac3f82a9bb0f64aca403d.tar.xz | |
iio: amplifiers: ad8366: 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.
Update the comment to include 'may'.
Fixes: e71d42e03c60 ("iio: amplifiers: New driver for AD8366 Dual-Digital Variable Gain Amplifier")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-42-jic23@kernel.org
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iio/amplifiers/ad8366.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c index 1134ae12e531..f2c2ea79a07f 100644 --- a/drivers/iio/amplifiers/ad8366.c +++ b/drivers/iio/amplifiers/ad8366.c @@ -45,10 +45,10 @@ struct ad8366_state { enum ad8366_type type; struct ad8366_info *info; /* - * DMA (thus cache coherency maintenance) requires the + * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. */ - unsigned char data[2] ____cacheline_aligned; + unsigned char data[2] __aligned(IIO_DMA_MINALIGN); }; static struct ad8366_info ad8366_infos[] = { |