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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 20:56:06 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 13:53:13 +0300 |
| commit | 9d7019e43ee67a48cef63f8f23f002233064d390 (patch) | |
| tree | 5d2f5648d1c0c8bc84653ea660ae80b7db775e47 | |
| parent | f746ab0bac5b335b09143dcd01db6f9f26d0c9ec (diff) | |
| download | linux-9d7019e43ee67a48cef63f8f23f002233064d390.tar.xz | |
iio: adc: max1241: 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: 8a80a71d9020 ("iio: adc: Add MAX1241 driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Alexandru Lazar <alazar@startmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-27-jic23@kernel.org
| -rw-r--r-- | drivers/iio/adc/max1241.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/adc/max1241.c b/drivers/iio/adc/max1241.c index a5afd84af58b..a815ad1f6913 100644 --- a/drivers/iio/adc/max1241.c +++ b/drivers/iio/adc/max1241.c @@ -26,7 +26,7 @@ struct max1241 { struct regulator *vref; struct gpio_desc *shutdown; - __be16 data ____cacheline_aligned; + __be16 data __aligned(IIO_DMA_MINALIGN); }; static const struct iio_chan_spec max1241_channels[] = { |