diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 20:57:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-17 16:15:18 +0300 |
| commit | 51143f66752745405c2fcb075808699421d7c0d4 (patch) | |
| tree | ba1bf9e2e63abec0422549c1f654f364ed2b0ba8 | |
| parent | 903e5ff430d678facab4fe2ed37bd2f65f194ce1 (diff) | |
| download | linux-51143f66752745405c2fcb075808699421d7c0d4.tar.xz | |
iio: potentiometer: mcp41010: Fix alignment for DMA safety
[ Upstream commit c5f78f4d2168ba21324095b0d46d4353c2eace4d ]
____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: 092cb71a604e ("iio: potentiometer: Add driver for Microchip MCP41xxx/42xxx")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-84-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/iio/potentiometer/mcp41010.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/potentiometer/mcp41010.c b/drivers/iio/potentiometer/mcp41010.c index 30a4594d4e11..2b73c7540209 100644 --- a/drivers/iio/potentiometer/mcp41010.c +++ b/drivers/iio/potentiometer/mcp41010.c @@ -60,7 +60,7 @@ struct mcp41010_data { const struct mcp41010_cfg *cfg; struct mutex lock; /* Protect write sequences */ unsigned int value[MCP41010_MAX_WIPERS]; /* Cache wiper values */ - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; #define MCP41010_CHANNEL(ch) { \ |