iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

iio: dac: ad8801: Fix alignment for DMA safety

Browse Source 
[ Upstream commit 1c20292c6b60cfc60a5e652174b8063e5cc03fec ]

____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: 7f270bc9a2d9 ("iio: dac: AD8801: add Analog Devices AD8801/AD8803 support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-59-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2022-05-08 18:56:38 +01:00 committed by Greg Kroah-Hartman
parent 1d62ff4966
commit 8e23928dcb
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/iio/dac/ad8801.c
View File

@ -26,7 +26,7 @@ struct ad8801_state {
struct regulator *vrefh_reg;
struct regulator *vrefl_reg;
__be16 data ____cacheline_aligned;
__be16 data __aligned(IIO_DMA_MINALIGN);
};
static int ad8801_spi_write(struct ad8801_state *state,