From: Andrew Lunn <andrew@lunn•ch>
To: Heiner Kallweit <hkallweit1@gmail•com>
Cc: David Miller <davem@davemloft•net>,
Florian Fainelli <f.fainelli@gmail•com>,
Realtek linux nic maintainers <nic_swsd@realtek•com>,
"netdev@vger•kernel.org" <netdev@vger•kernel.org>
Subject: Re: [PATCH net-next 08/10] r8169: remove rtl8169_set_speed_xmii
Date: Wed, 4 Jul 2018 16:46:17 +0200 [thread overview]
Message-ID: <20180704144617.GF12405@lunn.ch> (raw)
In-Reply-To: <30dcf9f0-b5a0-1690-6964-a0afff6c3fec@gmail.com>
On Mon, Jul 02, 2018 at 11:54:54PM +0200, Heiner Kallweit wrote:
> On 02.07.2018 23:21, Andrew Lunn wrote:
> >> - auto_nego |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
> >
> > This bit you probably want to keep. The PHY never says it support
> > Pause. The MAC needs to enable pause if the MAC supports pause.
> >
> Actually I assumed that phylib would do this for me. But:
> In phy_probe() first phydev->supported is copied to
> phydev->advertising, and only after this both pause flags are added
> to phydev->supported. Therefore I think they are not advertised.
> Is this intentional? It sounds a little weird to me to add the
> pause flags to the supported features per default, but not
> advertise them.
phylib has no idea if the MAC supports Pause. So it should not enable
it by default. The MAC needs to enable it. And a lot of MAC drivers
get this wrong...
> Except e.g. we call by chance phy_set_max_speed(), which copies
> phydev->supported to phydev->advertising after having adjusted
> the supported speeds.
As you correctly pointed out, phy_set_max_speed() is masking out too
much.
> If this is not a bug, then where would be the right place to add
> the pause flags to phydev->advertising?
Before you call phy_start().
Andrew
next prev parent reply other threads:[~2018-07-04 14:46 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-02 19:29 [PATCH net-next 00/10] r8169: add phylib support Heiner Kallweit
2018-07-02 19:36 ` [PATCH net-next 01/10] r8169: add basic " Heiner Kallweit
2018-07-02 21:02 ` Andrew Lunn
2018-07-02 21:15 ` Heiner Kallweit
2018-07-03 16:42 ` Florian Fainelli
2018-07-03 19:48 ` Heiner Kallweit
2018-07-02 19:36 ` [PATCH net-next 02/10] r8169: use phy_resume/phy_suspend Heiner Kallweit
2018-07-02 21:06 ` Andrew Lunn
2018-07-02 21:24 ` Heiner Kallweit
2018-07-03 16:44 ` Florian Fainelli
2018-07-03 19:54 ` Heiner Kallweit
2018-07-02 19:36 ` [PATCH net-next 03/10] r8169: replace open-coded PHY soft reset with genphy_soft_reset Heiner Kallweit
2018-07-02 21:08 ` Andrew Lunn
2018-07-02 19:37 ` [PATCH net-next 04/10] r8169: use phy_ethtool_(g|s)et_link_ksettings Heiner Kallweit
2018-07-02 19:37 ` [PATCH net-next 05/10] r8169: use phy_ethtool_nway_reset Heiner Kallweit
2018-07-02 21:11 ` Andrew Lunn
2018-07-02 19:37 ` [PATCH net-next 06/10] r8169: use phy_mii_ioctl Heiner Kallweit
2018-07-02 21:13 ` Andrew Lunn
2018-07-02 19:37 ` [PATCH net-next 07/10] r8169: migrate speed_down function to phylib Heiner Kallweit
2018-07-02 21:20 ` Andrew Lunn
2018-07-02 21:31 ` Heiner Kallweit
2018-07-03 16:48 ` Florian Fainelli
2018-07-09 21:04 ` Heiner Kallweit
2018-07-02 19:37 ` [PATCH net-next 08/10] r8169: remove rtl8169_set_speed_xmii Heiner Kallweit
2018-07-02 21:21 ` Andrew Lunn
2018-07-02 21:54 ` Heiner Kallweit
2018-07-04 14:46 ` Andrew Lunn [this message]
2018-07-04 18:13 ` Heiner Kallweit
2018-07-02 19:37 ` [PATCH net-next 09/10] r8169: remove mii_if_info member from struct rtl8169_private Heiner Kallweit
2018-07-02 19:37 ` [PATCH net-next 10/10] r8169: don't read chip phy status register Heiner Kallweit
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