iio: mcp320x: Fix occasional incorrect readings

Without the cacheline alignment, the readings will occasionally incorrectly
return 0.

Signed-off-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c
index efbfd12a4bfd..8d9c9b9215dd 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,