[PATCH 5.19 0696/1157] iio: frequency: adf4371: Fix alignment for DMA safety

Greg Kroah-Hartman
2022-08-16T04:38:10Z

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

[ Upstream commit 0bb5675befe666eeed71ad808426cf2ec1c9a714 ]

____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: 7f699bd14913 ("iio: frequency: adf4371: Add support for ADF4371 PLL")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-68-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iio/frequency/adf4371.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/frequency/adf4371.c b/drivers/iio/frequency/adf4371.c
index ecd5e18995ad..135c8cedc33d 100644
--- a/drivers/iio/frequency/adf4371.c
+++ b/drivers/iio/frequency/adf4371.c
@@ -175,7 +175,7 @@ struct adf4371_state {
unsigned int mod2;
unsigned int rf_div_sel;
unsigned int ref_div_factor;
- u8 buf[10] ____cacheline_aligned;
+ u8 buf[10] __aligned(IIO_DMA_MINALIGN);
};

static unsigned long long adf4371_pll_fract_n_get_rate(struct adf4371_state *st,
--
2.35.1