iio: frequency: adrf6780: 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: 63aaf6d06d87 ("iio: frequency: adrf6780: add support for ADRF6780")
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/20220508175712.647246-72-jic23@kernel.org

diff --git a/drivers/iio/frequency/adrf6780.c b/drivers/iio/frequency/adrf6780.c
index 8255ffd..21878ba 100644 (file)
--- a/drivers/iio/frequency/adrf6780.c
+++ b/drivers/iio/frequency/adrf6780.c
@@ -86,7 +86,7 @@ struct adrf6780_state {
        bool                    uc_bias_en;
        bool                    lo_sideband;
        bool                    vdet_out_en;
-       u8                      data[3] ____cacheline_aligned;
+       u8                      data[3] __aligned(IIO_DMA_MINALIGN);
 };
 
 static int __adrf6780_spi_read(struct adrf6780_state *st, unsigned int reg,