netdev - Re: [RFC PATCH 3/4] igb: add support for extended PHC gettime

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Message-ID: <20181031093935.GL31668@localhost>
Date:   Wed, 31 Oct 2018 10:39:35 +0100
From:   Miroslav Lichvar <mlichvar@...hat.com>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     netdev@...r.kernel.org, intel-wired-lan@...ts.osuosl.org,
        Jacob Keller <jacob.e.keller@...el.com>
Subject: Re: [RFC PATCH 3/4] igb: add support for extended PHC gettime

On Tue, Oct 30, 2018 at 07:29:16PM -0700, Richard Cochran wrote:
> On Fri, Oct 26, 2018 at 06:27:41PM +0200, Miroslav Lichvar wrote:
> > +static int igb_ptp_gettimex(struct ptp_clock_info *ptp,
> > +			    struct ptp_system_timestamp *sts)
> > +{
> > +	struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
> > +					       ptp_caps);
> > +	struct e1000_hw *hw = &igb->hw;
> > +	unsigned long flags;
> > +	u32 lo, hi;
> > +	u64 ns;
> > +
> > +	spin_lock_irqsave(&igb->tmreg_lock, flags);
> > +
> > +	/* 82576 doesn't have SYSTIMR */
> > +	if (igb->hw.mac.type == e1000_82576) {
> 
> Instead of if/then/else, can't you follow the pattern of providing
> different function flavors ...

I can. I was just trying to minimize the amount of triplicated code.
In the next version I'll add a patch to deprecate the old gettime
functions, as Jacob suggested, and replace them with the extended
versions, so the amount of code will not change that much.

Thanks,

-- 
Miroslav Lichvar