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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 18:56:36 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:16 +0100 |
| commit | 8482468b30bdb16d4a764f995d7a63d94fa0cf40 (patch) | |
| tree | 2d6877f379adab22d4c30aae0d5e570f7ab62104 /drivers/iio/dac/ad7293.c | |
| parent | b2d5e9de77c8774a5a6cff59d928f2fa38cbc642 (diff) | |
| download | lwn-8482468b30bdb16d4a764f995d7a63d94fa0cf40.tar.gz lwn-8482468b30bdb16d4a764f995d7a63d94fa0cf40.zip | |
iio: dac: ad7293: 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: 0bb12606c05f ("iio:dac:ad7293: add support for AD7293")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Antoniu Miclaus <antoniu.miclaus@analog.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-57-jic23@kernel.org
Diffstat (limited to 'drivers/iio/dac/ad7293.c')
| -rw-r--r-- | drivers/iio/dac/ad7293.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/dac/ad7293.c b/drivers/iio/dac/ad7293.c index 59a38ca4c3c7..06f05750d921 100644 --- a/drivers/iio/dac/ad7293.c +++ b/drivers/iio/dac/ad7293.c @@ -144,7 +144,7 @@ struct ad7293_state { struct regulator *reg_avdd; struct regulator *reg_vdrive; u8 page_select; - u8 data[3] ____cacheline_aligned; + u8 data[3] __aligned(IIO_DMA_MINALIGN); }; static int ad7293_page_select(struct ad7293_state *st, unsigned int reg) |