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[v2,62/92] iio: dac: ti-dac5571: Fix alignment for DMA safety

Message ID 20220508175712.647246-63-jic23@kernel.org (mailing list archive)
State Accepted
Headers show
Series IIO: Fix alignment of buffers for DMA | expand

Commit Message

Jonathan Cameron May 8, 2022, 5:56 p.m. UTC 
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

____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: df38a4a72a3b ("iio: dac: add TI DAC5571 family support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Acked-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/dac/ti-dac5571.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/iio/dac/ti-dac5571.c b/drivers/iio/dac/ti-dac5571.c
index 0b775f943db3..ba68ea1e3455 100644
--- a/drivers/iio/dac/ti-dac5571.c
+++ b/drivers/iio/dac/ti-dac5571.c
@@ -52,7 +52,7 @@  struct dac5571_data {
 	struct dac5571_spec const *spec;
 	int (*dac5571_cmd)(struct dac5571_data *data, int channel, u16 val);
 	int (*dac5571_pwrdwn)(struct dac5571_data *data, int channel, u8 pwrdwn);
-	u8 buf[3] ____cacheline_aligned;
+	u8 buf[3] __aligned(IIO_DMA_MINALIGN);
 };
 
 #define DAC5571_POWERDOWN(mode)		((mode) + 1)