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iio: dac: ti-dac5571: Fix alignment for DMA safety

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[ Upstream commit 58e22371539e01c742be5c30295f591a6a17e348 ]

____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: df38a4a72a3b ("iio: dac: add TI DAC5571 family support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-63-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2022-05-08 18:56:42 +01:00 committed by Greg Kroah-Hartman
parent c8942b7c25
commit 450562e3d5
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/dac/ti-dac5571.c
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@ -52,7 +52,7 @@ struct dac5571_data {
struct dac5571_spec const *spec;
int (*dac5571_cmd)(struct dac5571_data *data, int channel, u16 val);
int (*dac5571_pwrdwn)(struct dac5571_data *data, int channel, u8 pwrdwn);
u8 buf[3] ____cacheline_aligned;
u8 buf[3] __aligned(IIO_DMA_MINALIGN);
};
#define DAC5571_POWERDOWN(mode) ((mode) + 1)