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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 18:56:03 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:13 +0100 |
| commit | e754fb7e7a05e3838c9aa044b4114869dd0d1e17 (patch) | |
| tree | d546cad338cfbb8475583e59793f70180ad35d5a | |
| parent | 6ebf401d555ee1e75e779b865d38e171db0aa1f2 (diff) | |
| download | linux-e754fb7e7a05e3838c9aa044b4114869dd0d1e17.tar.gz linux-e754fb7e7a05e3838c9aa044b4114869dd0d1e17.tar.bz2 linux-e754fb7e7a05e3838c9aa044b4114869dd0d1e17.zip | |
iio: adc: max1027: 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: fc167f624833 ("iio: add support of the max1027")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-24-jic23@kernel.org
| -rw-r--r-- | drivers/iio/adc/max1027.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c index 4daf1d576c4e..b725d012625c 100644 --- a/drivers/iio/adc/max1027.c +++ b/drivers/iio/adc/max1027.c @@ -272,7 +272,7 @@ struct max1027_state { struct mutex lock; struct completion complete; - u8 reg ____cacheline_aligned; + u8 reg __aligned(IIO_DMA_MINALIGN); }; static int max1027_wait_eoc(struct iio_dev *indio_dev) |