netdev - Re: [net-next 04/13] e1000e: cleanup checkpatch PREFER_PR

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Date:	Fri, 24 Aug 2012 14:19:24 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	Joe Perches <joe@...ches.com>,
	"Allan, Bruce W" <bruce.w.allan@...el.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	gospo@...hat.com, sassmann@...hat.com
Subject: Re: [net-next 04/13] e1000e: cleanup checkpatch PREFER_PR_LEVEL
 warning

On Fri, 2012-08-24 at 11:02 -0700, Joe Perches wrote:
> On Thu, 2012-08-23 at 07:01 -0700, Joe Perches wrote:
> > On Thu, 2012-08-23 at 02:56 -0700, Jeff Kirsher wrote:
> > > From: Bruce Allan <bruce.w.allan@...el.com>
> > > 
> > > checkpatch warning: Prefer pr_info(... to printk(KERN_INFO, ...
> > []
> > > diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
> > []
> > > @@ -4330,9 +4330,8 @@ static void e1000_print_link_info(struct e1000_adapter *adapter)
> > >  	u32 ctrl = er32(CTRL);
> > >  
> > >  	/* Link status message must follow this format for user tools */
> > > -	printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
> > > -		adapter->netdev->name,
> > > -		adapter->link_speed,
> > > +	pr_info("e1000e: %s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
> > > +		adapter->netdev->name, adapter->link_speed,
> > >  		adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half",
> > >  		(ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" :
> > >  		(ctrl & E1000_CTRL_RFCE) ? "Rx" :
> > 
> > I think these conversions are not a good idea.
> > 
> > When you have a specific message format that must be
> > followed, use printk.
> > 
> > pr_<level> may at some point in the near future use
> > #define pr_fmt(fmt) KBUiLD_MODNAME ": " fmt
> > as a global default equivalent.
> 
> Hey Jeff.
> 
> The comment above this change (and the other) reads
> 
>   	/* Link status message must follow this format for user tools */
> 
> This file already uses #define pr_fmt(fmt) KBUILD_MODNAME...
> With this patch, the output form changes to use 2 prefixes.
> 
> Is that really desired?  Probably not.
> 
> If the comments are old and don't apply any more, they
> should be removed.
> 

Bruce really should answer this since this is his patch and there was a
reason why he made the change.  My guess was the current output was
providing incorrect or mis-leading information.

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