diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 18:57:04 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:19 +0100 |
| commit | 4842e5de6f39ebf2c0f6da9e6a0cb751c7108507 (patch) | |
| tree | 9d05597c4b9342c8e67b993e84079b67fa73c67f /drivers/iio/potentiometer | |
| parent | c5f78f4d2168ba21324095b0d46d4353c2eace4d (diff) | |
iio: potentiometer: mcp4131: 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: 22d199a53910 ("iio: potentiometer: add driver for Microchip MCP413X/414X/415X/416X/423X/424X/425X/426X")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-85-jic23@kernel.org
Diffstat (limited to 'drivers/iio/potentiometer')
| -rw-r--r-- | drivers/iio/potentiometer/mcp4131.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/potentiometer/mcp4131.c b/drivers/iio/potentiometer/mcp4131.c index 7c8c18ab8764..7890c0993ec4 100644 --- a/drivers/iio/potentiometer/mcp4131.c +++ b/drivers/iio/potentiometer/mcp4131.c @@ -129,7 +129,7 @@ struct mcp4131_data { struct spi_device *spi; const struct mcp4131_cfg *cfg; struct mutex lock; - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; #define MCP4131_CHANNEL(ch) { \ |