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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-05-08 19:55:59 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-14 12:53:13 +0200 |
| commit | 9c6c7eff7d4a53efd4d0818f8664259a1862665a (patch) | |
| tree | 12994135bf2310ee77618a8aef328acb5ce24a8f /drivers/iio/adc/ad7949.c | |
| parent | iio: adc: ad7923: Fix alignment for DMA safety (diff) | |
| download | linux-9c6c7eff7d4a53efd4d0818f8664259a1862665a.tar.xz linux-9c6c7eff7d4a53efd4d0818f8664259a1862665a.zip | |
iio: adc: ad7949: 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.
Note the fixes tag predates some changes to this line of code so
automated application of this fix may fail.
Fixes: 7f40e0614317 ("iio:adc:ad7949: Add AD7949 ADC driver family")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Charles-Antoine Couret <charles-antoine.couret@essensium.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-20-jic23@kernel.org
Diffstat (limited to '')
| -rw-r--r-- | drivers/iio/adc/ad7949.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/adc/ad7949.c b/drivers/iio/adc/ad7949.c index 44bb5fde83de..ed4c1656ca75 100644 --- a/drivers/iio/adc/ad7949.c +++ b/drivers/iio/adc/ad7949.c @@ -86,7 +86,7 @@ struct ad7949_adc_chip { u8 resolution; u16 cfg; unsigned int current_channel; - u16 buffer ____cacheline_aligned; + u16 buffer __aligned(IIO_DMA_MINALIGN); __be16 buf8b; }; |