linux-kernel - Re: [PATCH v2] I2C: busses: i2c-eg20t Do not print error message in syslog if no ACK received

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Message-ID: <20131117165329.GA1562@thinkpad.fritz.box>
Date:	Sun, 17 Nov 2013 17:53:29 +0100
From:	Andreas Werner <wernerandy@....de>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	khali@...ux-fr.org, jacmet@...site.dk, hskinnemoen@...il.com,
	dianders@...omium.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] I2C: busses: i2c-eg20t Do not print error message in
 syslog if no ACK received

On Sun, Nov 17, 2013 at 01:18:09PM +0100, Wolfram Sang wrote:
> 
> > Is there another reason why pch_i2c_getack returned EPROTO?
> > May be ENXIO was introduced later?
> 
> Imperfect review :)
> 
> > I think we can just replace the -EIO with -ENXIO or do you want to pick up the return
> > vale of pch_i2c_getack and return that ?
> 
> The latter. As a rule of thumb, it is usually more sustainable to pass
> through error codes. Overloading them should only be done when really
> necessary IMO.
> 
Ok, if that will be ok in pch_i2c_wait_for_check_xfer i will resend 
the patch.

        ret = pch_i2c_getack(adap);

        if (ret)
                pch_dbg(adap, "Receive NACK for slave address setting\n");

        return (int)ret;

Regards 
Andy
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