diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 18:57:08 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 11:53:19 +0100 |
| commit | 37882314d3bdc2ae775ebb9fa8ed7a94cd1aad61 (patch) | |
| tree | 261c5e32c7651b2142c44fa13e8b365bfd772836 | |
| parent | e558a79b6d66c6678049eadeb321f6203764c10d (diff) | |
| download | linux-stable-37882314d3bdc2ae775ebb9fa8ed7a94cd1aad61.tar.gz linux-stable-37882314d3bdc2ae775ebb9fa8ed7a94cd1aad61.tar.bz2 linux-stable-37882314d3bdc2ae775ebb9fa8ed7a94cd1aad61.zip | |
iio: resolver: ad2s1200: 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 tag is probably not where the issue was first introduced, but
is likely to be as far as anyone considers backporting this fix.
Fixes: 0bd3d338f61b ("staging: iio: ad2s1200: Improve readability with be16_to_cpup")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-89-jic23@kernel.org
| -rw-r--r-- | drivers/iio/resolver/ad2s1200.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/resolver/ad2s1200.c b/drivers/iio/resolver/ad2s1200.c index 9746bd935628..9d95241bdf8f 100644 --- a/drivers/iio/resolver/ad2s1200.c +++ b/drivers/iio/resolver/ad2s1200.c @@ -41,7 +41,7 @@ struct ad2s1200_state { struct spi_device *sdev; struct gpio_desc *sample; struct gpio_desc *rdvel; - __be16 rx ____cacheline_aligned; + __be16 rx __aligned(IIO_DMA_MINALIGN); }; static int ad2s1200_read_raw(struct iio_dev *indio_dev, |