From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Dooks Subject: [PATCH 3/6] i2c: rcar: do not print error if device nacks transfer Date: Sun, 26 Jan 2014 16:05:34 +0000 Message-ID: <1390752337-22386-4-git-send-email-ben.dooks@codethink.co.uk> References: <1390752337-22386-1-git-send-email-ben.dooks@codethink.co.uk> Return-path: In-Reply-To: <1390752337-22386-1-git-send-email-ben.dooks-4yDnlxn2s6sWdaTGBSpHTA@public.gmane.org> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-kernel-81qHHgoATdFT9dQujB1mzip2UmYkHbXO@public.gmane.org Cc: Ben Dooks , Simon Horman , Wolfram Sang , linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-i2c@vger.kernel.org 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 Cc: Simon Horman Cc: Wolfram Sang Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Signed-off-by: Ben Dooks --- drivers/i2c/busses/i2c-rcar.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 2c2fd7c..0d25104 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -623,7 +623,7 @@ 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; -- 1.8.5.2