linux-kernel - Re: [PATCH v3 05/14] i2c-octeon: Make adapter timeout tunable

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Message-ID: <20160314124505.GA5771@hardcore>
Date:	Mon, 14 Mar 2016 13:45:05 +0100
From:	Jan Glauber <jan.glauber@...iumnetworks.com>
To:	Wolfram Sang <wsa@...-dreams.de>
CC:	<linux-kernel@...r.kernel.org>, <linux-i2c@...r.kernel.org>,
	David Daney <ddaney@...iumnetworks.com>,
	Peter Swain <pswain@...ium.com>
Subject: Re: [PATCH v3 05/14] i2c-octeon: Make adapter timeout tunable

On Sat, Mar 12, 2016 at 04:46:12PM +0100, Wolfram Sang wrote:
> On Mon, Mar 07, 2016 at 04:10:48PM +0100, Jan Glauber wrote:
> > From: Peter Swain <pswain@...ium.com>
> > 
> > Make the i2c adapter timeout a module parameter to allow upper-level
> > target device drivers to retry with their own logic before their own
> > timeouts abort operations.
> > 
> > For example, at24 eeprom driver retries for 25ms when -EAGAIN
> > indicates that an eeprom has gone unresponsive while committing
> > a newly written page (5ms on typical devices).
> > 
> > Signed-off-by: Peter Swain <pswain@...ium.com>
> > Signed-off-by: Jan Glauber <jglauber@...ium.com>
> 
> i2c-dev has IOCTLs for timeout and retries. Can't you use those?
> 

Yes, with these IOCTLs we don't need to add a module parameter
so I'll drop that.