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iio: dac: ad5592r: Fix alignment for DMA safety

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[ Upstream commit 4a4a79c06caeec47003bcbee1cf3094479f26e24 ]

____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: 56ca9db862bf ("iio: dac: Add support for the AD5592R/AD5593R ADCs/DACs")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Paul Cercueil <paul@crapouillou.net>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-49-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2022-05-08 18:56:28 +01:00 committed by Greg Kroah-Hartman
parent cee702a279
commit 9748b6c196
1 changed files with 3 additions and 1 deletions
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4
drivers/iio/dac/ad5592r-base.h
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@ -14,6 +14,8 @@
#include <linux/mutex.h>
#include <linux/gpio/driver.h>
#include <linux/iio/iio.h>
struct device;
struct ad5592r_state;
@ -65,7 +67,7 @@ struct ad5592r_state {
u8 gpio_in;
u8 gpio_val;
__be16 spi_msg ____cacheline_aligned;
__be16 spi_msg __aligned(IIO_DMA_MINALIGN);
__be16 spi_msg_nop;
};