[PATCH 5.18 0655/1095] iio: frequency: adrf6780: Fix alignment for DMA safety

Greg Kroah-Hartman
2022-08-15T21:42:30Z

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

[ Upstream commit 9a5b11884cb72780cb824cac8aab47094654a84f ]

____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
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iio/frequency/adrf6780.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/frequency/adrf6780.c b/drivers/iio/frequency/adrf6780.c
index 8255ffd174f6..21878bad0909 100644
--- 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,
--
2.35.1