Commit 55afdd05 authored by Jonathan Cameron's avatar Jonathan Cameron
Browse files

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



____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: d935eddd ("iio: adc: Add driver for Texas Instruments ADS131E0x ADC family")
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Tomislav Denis <tomislav.denis@avl.com>
Acked-by: default avatarNuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-36-jic23@kernel.org
parent 7df19bd2

drivers/iio/adc/ti-ads131e08.c

+1 −1
Original line number Diff line number Diff line
@@ -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