[PATCH 1/4] i2c: xlp9xx: return ENXIO on slave address NACK

[George Cherian]

From: Dmitry Bazhenov <dmitry.bazhe...@auriga.com>

Fix the driver violation of the common practice to return
ENXIO error on a slave address NACK.

Signed-off-by: Dmitry Bazhenov <dmitry.bazhe...@auriga.com>
Signed-off-by: George Cherian <george.cher...@cavium.com>
---
 drivers/i2c/busses/i2c-xlp9xx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-xlp9xx.c b/drivers/i2c/busses/i2c-xlp9xx.c
index b970bf8..6d78cdc 100644
--- a/drivers/i2c/busses/i2c-xlp9xx.c
+++ b/drivers/i2c/busses/i2c-xlp9xx.c
@@ -324,7 +324,8 @@ static int xlp9xx_i2c_xfer_msg(struct xlp9xx_i2c_dev *priv, 
struct i2c_msg *msg,
                dev_dbg(priv->dev, "transfer error %x!\n", priv->msg_err);
                if (priv->msg_err & XLP9XX_I2C_INTEN_BUSERR)
                        xlp9xx_i2c_init(priv);
-               return -EIO;
+               return (priv->msg_err & XLP9XX_I2C_INTEN_NACKADDR) ?
+                       -ENXIO : -EIO;
        }
 
        if (timeleft == 0) {
-- 
2.1.4