From: Andrew Lunn <andrew@lunn.ch>
To: Richard Cochran <richardcochran@gmail.com>
Cc: netdev <netdev@vger.kernel.org>,
Florian Fainelli <f.fainelli@gmail.com>,
Vivien Didelot <vivien.didelot@savoirfairelinux.com>,
sean.wang@mediatek.com, Woojung.Huh@microchip.com,
john@phrozen.org, jbe@pengutronix.de,
Brandon Streiff <brandon.streiff@ni.com>
Subject: Re: [RFC PATCH 04/10] net: dsa: mv88e6xxx: expose switch time as a PTP hardware clock
Date: Fri, 9 Feb 2018 22:04:59 +0100 [thread overview]
Message-ID: <20180209210459.GC2079@lunn.ch> (raw)
In-Reply-To: <20180209203336.fqkuliaqmonl67jg@localhost>
On Fri, Feb 09, 2018 at 12:33:36PM -0800, Richard Cochran wrote:
> On Sat, Feb 03, 2018 at 10:40:08PM +0100, Andrew Lunn wrote:
> > +static int mv88e6xxx_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
> > +{
> > + struct mv88e6xxx_chip *chip = ptp_to_chip(ptp);
> > + int neg_adj = 0;
> > + u32 diff, mult;
> > + u64 adj;
> > +
> > + if (scaled_ppm < 0) {
> > + neg_adj = 1;
> > + scaled_ppm = -scaled_ppm;
> > + }
> > + mult = CC_MULT;
> > + adj = scaled_ppm * CC_MULT_NUM;
> ^^^^^^^^^^^^^^^^^^^^^^^^
> This easily overflows on 32 bit platforms. My bad. Fix below...
Hi Richard
Thanks, i will squash the fix in for the next version.
Andrew
next prev parent reply other threads:[~2018-02-09 21:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-03 21:40 [RFC PATCH 00/10] PTP support for DSA and mv88e6xxx driver Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 01/10] net: ptp: Add stub for ptp_classify_raw() Andrew Lunn
2018-02-04 9:34 ` Sergei Shtylyov
2018-02-03 21:40 ` [RFC PATCH 02/10] net: dsa: mv88e6xxx: export g2 register accessors Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 03/10] net: dsa: mv88e6xxx: add accessors for PTP/TAI registers Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 04/10] net: dsa: mv88e6xxx: expose switch time as a PTP hardware clock Andrew Lunn
2018-02-09 20:33 ` Richard Cochran
2018-02-09 21:04 ` Andrew Lunn [this message]
2018-02-03 21:40 ` [RFC PATCH 05/10] net: dsa: mv88e6xxx: add support for GPIO configuration Andrew Lunn
2018-02-04 19:53 ` Florian Fainelli
2018-02-04 20:17 ` Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 06/10] net: dsa: mv88e6xxx: add support for event capture Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 07/10] net: dsa: forward hardware timestamping ioctls to switch driver Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 08/10] net: dsa: forward timestamping callbacks to switch drivers Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 09/10] net: dsa: mv88e6xxx: add rx/tx timestamping support Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 10/10] net: dsa: mv88e6xxx: add workaround for 6341 timestamping Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 11/12] net: dsa: mv88e6xxx: Release mutex between each statistics read Andrew Lunn
2018-02-03 21:40 ` [RFC PATCH 12/12] net: dsa: mv88e6xxx: Release mutex between each ATU read Andrew Lunn
2018-02-06 19:44 ` [RFC PATCH 00/10] PTP support for DSA and mv88e6xxx driver Brandon Streiff
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