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i2c: rcar: do not print error if device nacks transfer 

The i2c-rcar driver currently prints an error message if the master_xfer
callback fails. However if the bus is being probed then lots of NAKs
will be generated, causing the output of a number of errors printed.

To solve this, disable the print if the error is not -EREMOTEIO.

An example of running i2cdetect:

10: i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- 12 i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Ben Dooks 2014-01-26 16:05:34 +00:00 committed by Wolfram Sang
parent 72fa818e8a
commit 770540f029
1 changed files with 1 additions and 1 deletions
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2
drivers/i2c/busses/i2c-rcar.c
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@ -622,7 +622,7 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap,
pm_runtime_put(dev);
if (ret < 0)
if (ret < 0 && ret != -EREMOTEIO)
dev_err(dev, "error %d : %x\n", ret, priv->flags);
return ret;