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iio: dac: ti-dac7311: Fix alignment for DMA safety

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[ Upstream commit 3637c49ed54632d7c221af718d2d7b1d381d4b6e ]

____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: 7a02ef7907d8 ("iio:dac:ti-dac7311 Add driver for Texas Instrument DAC7311")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Charles-Antoine Couret <charles-antoine.couret@essensium.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-64-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2022-05-08 18:56:43 +01:00 committed by Greg Kroah-Hartman
parent 450562e3d5
commit d8aa41f4d8
1 changed files with 1 additions and 1 deletions
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drivers/iio/dac/ti-dac7311.c
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@ -52,7 +52,7 @@ struct ti_dac_chip {
bool powerdown;
u8 powerdown_mode;
u8 resolution;
u8 buf[2] ____cacheline_aligned;
u8 buf[2] __aligned(IIO_DMA_MINALIGN);
};
static u8 ti_dac_get_power(struct ti_dac_chip *ti_dac, bool powerdown)