i2c/mips: Fix error return codes from Sibyte i2c bus driver

Sibyte i2c bus driver returns non-descriptive error values.
Update to return error values as defined in Documentation/i2c/fault-codes.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/i2c/busses/i2c-sibyte.c b/drivers/i2c/busses/i2c-sibyte.c
index 3d76a188e42f..0fe505d7abe9 100644
--- a/drivers/i2c/busses/i2c-sibyte.c
+++ b/drivers/i2c/busses/i2c-sibyte.c
@@ -94,7 +94,7 @@ static int smbus_xfer(struct i2c_adapter *i2c_adap, u16 addr,
                 }
                 break;
         default:
-                return -1;      /* XXXKW better error code? */
+                return -EOPNOTSUPP;
         }
 
         while (csr_in32(SMB_CSR(adap, R_SMB_STATUS)) & M_SMB_BUSY)
@@ -104,7 +104,7 @@ static int smbus_xfer(struct i2c_adapter *i2c_adap, u16 addr,
         if (error & M_SMB_ERROR) {
                 /* Clear error bit by writing a 1 */
                 csr_out32(M_SMB_ERROR, SMB_CSR(adap, R_SMB_STATUS));
-                return -1;      /* XXXKW better error code? */
+                return (error & M_SMB_ERROR_TYPE) ? -EIO : -ENXIO;
         }
 
         if (data_bytes == 1)