netdev - Re: [net-next v2 11/16] i40e: remove chatty log messages

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Date:	Fri, 20 Dec 2013 09:59:20 -0800
From:	Joe Perches <joe@...ches.com>
To:	"Williams, Mitch A" <mitch.a.williams@...el.com>
Cc:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"gospo@...hat.com" <gospo@...hat.com>,
	"sassmann@...hat.com" <sassmann@...hat.com>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>
Subject: Re: [net-next v2 11/16] i40e: remove chatty log messages

On Fri, 2013-12-20 at 17:40 +0000, Williams, Mitch A wrote:
> > -----Original Message-----
> > From: Sergei Shtylyov [mailto:sergei.shtylyov@...entembedded.com]
[]
> > > diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
[]
> > > @@ -2988,21 +2988,11 @@ static int i40e_vsi_control_tx(struct i40e_vsi
> > *vsi, bool enable)
> > >   		} while (j-- && ((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT)
> > >   			       ^ (tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT)) & 1);
> > >
> > > -		if (enable) {
> > > -			/* is STAT set ? */
> > > -			if ((tx_reg & I40E_QTX_ENA_QENA_STAT_MASK)) {
> > > -				dev_info(&pf->pdev->dev,
> > > -					 "Tx %d already enabled\n", i);
> > > +		/* Skip if the queue is already in the requested state */
> > > +		if (enable && (tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
> > >   				continue;
> > 
> >     This line seems over-indented now.
> > 
> > > -			}
> > > -		} else {
> > > -			/* is !STAT set ? */
> > > -			if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK)) {
> > > -				dev_info(&pf->pdev->dev,
> > > -					 "Tx %d already disabled\n", i);
> > > +		if (!enable && !(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
> > >   				continue;
> > 
> >     This one too.
[]
> Sergei, if you look at the source instead of the patch, you'll see
> that these are correct. The whole thing is inside a for loop, so it
> should properly be indented two tabs.

I looked at the source.
Both continue statements _are_ overly indented.
4 tabs should be 3.

Also, this code is inconsistent and might be
nicer using the same form:

		/* Skip if the queue is already in the requested state */
		if (enable && (tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
			continue;
		if (!enable && !(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
			continue;

[...]

		/* wait for the change to finish */
		for (j = 0; j < 10; j++) {
			tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
			if (enable) {
				if ((tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
					break;
			} else {
				if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
					break;
			}

Perhaps the first form should be like the second

	if (enable) {
		if (tx_reg & I40E_QTX_ENA_QENA_STAT_MASK)
			continue;
	} else {
		if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
			continue;
	}

or maybe both should be

	bool mask = tx_reg & I40E_QTX_ENA_QENA_STAT_MASK;
	if (enable ^ mask)


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