[PATCH 5.19 0700/1157] iio: frequency: adrf6780: Fix alignment for DMA safety
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2022-08-16 04:37:48
Also in:
lkml
Subsystem:
analog devices inc adrf6780 driver, analog devices inc iio drivers, iio subsystem and drivers, the rest · Maintainers:
Antoniu Miclaus, Nuno Sá, Michael Hennerich, Jonathan Cameron, Linus Torvalds
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 (local)
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