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iio: adc: ti-ads131e08: Fix alignment for DMA safety

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[ Upstream commit 55afdd050c063ae4b8dbd566107a030c00d005fd ]

____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: d935eddd2799 ("iio: adc: Add driver for Texas Instruments ADS131E0x ADC family")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Tomislav Denis <tomislav.denis@avl.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-36-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2022-05-08 18:56:15 +01:00 committed by Greg Kroah-Hartman
parent 6f0ef2b9d4
commit 0c27b6ca86
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/ti-ads131e08.c
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@ -105,7 +105,7 @@ struct ads131e08_state {
s64 ts __aligned(8);
} tmp_buf;
u8 tx_buf[3] ____cacheline_aligned;
u8 tx_buf[3] __aligned(IIO_DMA_MINALIGN);
/*
* Add extra one padding byte to be able to access the last channel
* value using u32 pointer