Hi Guenter, On Sun, 20 Jun 2010 10:57:53 -0700, Guenter Roeck wrote: > 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 <[email protected]> > --- > drivers/i2c/busses/i2c-sibyte.c | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-sibyte.c b/drivers/i2c/busses/i2c-sibyte.c > index 3d76a18..329cbee 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 -ENXIO; > } > > if (data_bytes == 1)
Definitely an improvement. However, returning -ENXIO on all errors seems wrong. This error value should only be returned on missing ack from the slave on address byte. Isn't it possible to distinguish between different error kinds? M_SMB_ERROR_TYPE seems promising, but one would need to look up the datasheet (which I don't have) to discover its meaning. -- Jean Delvare -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
