netdev - Re: [PATCH RFC] mlx4_en: Add PTP hardware clock

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Message-ID: <20131211212304.GA8283@sbohrermbp13-local.rgmadvisors.com>
Date:	Wed, 11 Dec 2013 15:23:04 -0600
From:	Shawn Bohrer <shawn.bohrer@...il.com>
To:	Or Gerlitz <or.gerlitz@...il.com>
Cc:	Or Gerlitz <ogerlitz@...lanox.com>,
	Amir Vadai <amirv@...lanox.com>,
	Richard Cochran <richardcochran@...il.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	tomk@...advisors.com, Shawn Bohrer <sbohrer@...advisors.com>
Subject: Re: [PATCH RFC] mlx4_en: Add PTP hardware clock

On Wed, Dec 11, 2013 at 10:47:51PM +0200, Or Gerlitz wrote:
> On Wed, Dec 11, 2013 Shawn Bohrer <shawn.bohrer@...il.com> wrote:
> 
> > @@ -264,10 +267,6 @@ static void *mlx4_en_add(struct mlx4_dev *dev)
> >         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
> >                 mdev->port_cnt++;
> >
> > -       /* Initialize time stamp mechanism */
> > -       if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
> > -               mlx4_en_init_timestamp(mdev);
> > -
> >         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
> >                 if (!dev->caps.comp_pool) {
> >                         mdev->profile.prof[i].rx_ring_num =
> > @@ -305,6 +304,10 @@ static void *mlx4_en_add(struct mlx4_dev *dev)
> >                         mdev->pndev[i] = NULL;
> >         }
> >
> > +       /* Initialize time stamp mechanism */
> > +       if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
> > +               mlx4_en_init_timestamp(mdev);
> > +
> >         return mdev;
> 
> so you are reverting here commit 1ec4864b1017 "net/mlx4_en: Fixed
> crash when port type is changed" -- why?

For stupid reasons.  I'm using mdev->pndev[i]->perm_addr to initialize
the ptp_clock_info.name field in mlx4_en_init_timestamp().  I'll look
around and see if I can find something better to use and put this
back.

--
Shawn
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