[PATCH 5.19 0697/1157] iio: frequency: admv1013: Fix alignment for DMA safety

Greg Kroah-Hartman
2022-08-16T04:38:12Z

From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

[ Upstream commit b3f3f8d264b9be0cb3e50e89e3f8789a948a43bb ]

____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: da35a7b526d9 ("iio: frequency: admv1013: add support for ADMV1013")
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/20220508175712.647246-69-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iio/frequency/admv1013.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/frequency/admv1013.c b/drivers/iio/frequency/admv1013.c
index b0e1f6571afb..ed8167271358 100644
--- a/drivers/iio/frequency/admv1013.c
+++ b/drivers/iio/frequency/admv1013.c
@@ -100,7 +100,7 @@ struct admv1013_state {
unsigned int input_mode;
unsigned int quad_se_mode;
bool det_en;
- u8 data[3] ____cacheline_aligned;
+ u8 data[3] __aligned(IIO_DMA_MINALIGN);
};

static int __admv1013_spi_read(struct admv1013_state *st, unsigned int reg,
--
2.35.1