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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 20:57:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-17 16:15:19 +0300 |
| commit | 114ffd465579162368a463b70390e36057af303d (patch) | |
| tree | 49cf0d1ef393085075dff13fe057c4886572fd4d | |
| parent | 3af5ec85f49d86ba225fdf043a2675e2733e4735 (diff) | |
| download | linux-114ffd465579162368a463b70390e36057af303d.tar.xz | |
iio: temp: ltc2983: Fix alignment for DMA safety
[ Upstream commit 732f2cb2fbb51bd5bc03a114bd102ab3b2f537fe ]
____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: f110f3188e56 ("iio: temperature: Add support for LTC2983")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-91-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/iio/temperature/ltc2983.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/temperature/ltc2983.c b/drivers/iio/temperature/ltc2983.c index 4fc654275155..4b7f2b8a9758 100644 --- a/drivers/iio/temperature/ltc2983.c +++ b/drivers/iio/temperature/ltc2983.c @@ -204,11 +204,11 @@ struct ltc2983_data { u8 num_channels; u8 iio_channels; /* - * DMA (thus cache coherency maintenance) requires the + * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. * Holds the converted temperature */ - __be32 temp ____cacheline_aligned; + __be32 temp __aligned(IIO_DMA_MINALIGN); }; struct ltc2983_sensor { |