linux-kernel - Re: [PATCH] staging:comedi: Fixed coding convention issues.

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Message-ID: <20100617232810.GA6821@kroah.com>
Date:	Thu, 17 Jun 2010 16:28:10 -0700
From:	Greg KH <greg@...ah.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Mark Rankilor <reodge@...il.com>, devel@...verdev.osuosl.org,
	Henri Häkkinen <henuxd@...il.com>,
	gregkh@...e.de, andrea.gelmini@...ma.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging:comedi: Fixed coding convention issues.

On Thu, Jun 17, 2010 at 04:15:58PM -0700, Joe Perches wrote:
> On Thu, 2010-06-17 at 15:51 -0700, Greg KH wrote:
> > On Sat, Jun 12, 2010 at 10:30:50PM -0700, Joe Perches wrote:
> > > On Sat, 2010-06-12 at 22:07 -0700, Joe Perches wrote:
> > > > 2: Create some comedi logging functions or macros like:
> > > >    	comedi_<level>(fmt, arg...) (ie: comedi_info, comedi_err, etc)
> > > >    where "comedi:" is always prefixed and an
> > > >    optional #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> > > >    could be used.
> 
> > I would prefer the conversion of everything over to the dev_printk()
> > versions instead of creating a new macro for every individual subsystem.
> > That way you get the advantage of logging everything in the common
> > format and the dynamic debug functionality as well.
> 
> What I posted has dynamic_debug.
> 
> +#elif defined(CONFIG_DYNAMIC_DEBUG)
> +/* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
> +#define comedi_debug(fmt, ...)                         \
> +       dynamic_pr_debug(fmt, ##__VA_ARGS__)
> 
> As far as I know, comedi doesn't always take a struct device *.
> I believe it's only used when there's a DMA.

No, there's a struct device down in the device almost always.

> In struct comedi_device, there are two struct device *'s.
> 
> 	struct device *class_dev;
> ...
> 	struct device *hw_dev;

hw_dev is what we want to use.

thanks,

greg k-h
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