Commit 4842e5de authored by Jonathan Cameron's avatar Jonathan Cameron
Browse files

iio: potentiometer: mcp4131: Fix alignment for DMA safety 



____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: 22d199a5 ("iio: potentiometer: add driver for Microchip MCP413X/414X/415X/416X/423X/424X/425X/426X")
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: default avatarNuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-85-jic23@kernel.org
parent c5f78f4d

drivers/iio/potentiometer/mcp4131.c

+1 −1
Original line number Diff line number Diff line
@@ -129,7 +129,7 @@ struct mcp4131_data { 
	struct spi_device *spi;

	const struct mcp4131_cfg *cfg;

	struct mutex lock;

	u8 buf[2] ____cacheline_aligned;

	u8 buf[2] __aligned(IIO_DMA_MINALIGN);

};



#define MCP4131_CHANNEL(ch) {					\