Without the cacheline alignment, the readings will occasionally incorrectly
return 0.
Signed-off-by: Michael Welling <mwelling@xxxxxxxx>
---
v2: Moved buffers to the end of the mcp320x struct per suggestion to keep
them on their own cacheline.
drivers/iio/adc/mcp320x.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c
index efbfd12..8d9c9b9 100644
--- a/drivers/iio/adc/mcp320x.c
+++ b/drivers/iio/adc/mcp320x.c
@@ -60,12 +60,12 @@ struct mcp320x {
struct spi_message msg;
struct spi_transfer transfer[2];
- u8 tx_buf;
- u8 rx_buf[2];
-
struct regulator *reg;
struct mutex lock;
const struct mcp320x_chip_info *chip_info;
+
+ u8 tx_buf ____cacheline_aligned;
+ u8 rx_buf[2];
};
static int mcp320x_channel_to_tx_data(int device_index,
--
1.7.9.5
--
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