i2c-algo-pca: Return standard fault codes

Adjust i2c-algo-pca to return fault codes compliant with
Documentation/i2c/fault-codes, rather than the undocumented and
vague -EREMOTEIO.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Wolfram Sang <w.sang@pengutronix.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c
index 4ca9cf9cde73..beb9ffe2564b 100644
--- a/drivers/i2c/algos/i2c-algo-pca.c
+++ b/drivers/i2c/algos/i2c-algo-pca.c
@@ -196,7 +196,7 @@ static int pca_xfer(struct i2c_adapter *i2c_adap,
                 } else {
                         dev_dbg(&i2c_adap->dev, "bus is not idle. status is "
                                 "%#04x\n", state);
-                        return -EAGAIN;
+                        return -EBUSY;
                 }
         }
 
@@ -224,7 +224,7 @@ static int pca_xfer(struct i2c_adapter *i2c_adap,
         }
 
         curmsg = 0;
-        ret = -EREMOTEIO;
+        ret = -EIO;
         while (curmsg < num) {
                 state = pca_status(adap);
 
@@ -259,6 +259,7 @@ static int pca_xfer(struct i2c_adapter *i2c_adap,
                 case 0x20: /* SLA+W has been transmitted; NOT ACK has been received */
                         DEB2("NOT ACK received after SLA+W\n");
                         pca_stop(adap);
+                        ret = -ENXIO;
                         goto out;
 
                 case 0x40: /* SLA+R has been transmitted; ACK has been received */
@@ -283,6 +284,7 @@ static int pca_xfer(struct i2c_adapter *i2c_adap,
                 case 0x48: /* SLA+R has been transmitted; NOT ACK has been received */
                         DEB2("NOT ACK received after SLA+R\n");
                         pca_stop(adap);
+                        ret = -ENXIO;
                         goto out;
 
                 case 0x30: /* Data byte in I2CDAT has been transmitted; NOT ACK has been received */