Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.19 0717/1157] iio: temp: ltc2983: Fix alignment for DMA safety | Date | Mon, 15 Aug 2022 20:01:13 +0200 |
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From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
[ 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> --- drivers/iio/temperature/ltc2983.c | 4 ++-- 1 file 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 { -- 2.35.1
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