linux-kernel - Re: [PATCH net] net: mvpp2: 10G modes aren't supported on all ports

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Message-ID: <20181211163635.GG30658@n2100.armlinux.org.uk>
Date:   Tue, 11 Dec 2018 16:36:36 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Antoine Tenart <antoine.tenart@...tlin.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com,
        maxime.chevallier@...tlin.com, gregory.clement@...tlin.com,
        miquel.raynal@...tlin.com, nadavh@...vell.com, stefanc@...vell.com,
        ymarkman@...vell.com, mw@...ihalf.com,
        Baruch Siach <baruch@...s.co.il>
Subject: Re: [PATCH net] net: mvpp2: 10G modes aren't supported on all ports

On Tue, Dec 11, 2018 at 05:32:28PM +0100, Antoine Tenart wrote:
> The mvpp2_phylink_validate() function sets all modes that are
> supported by a given PPv2 port. A recent change made all ports to
> advertise they support 10G modes in certain cases. This is not true,
> as only the port #0 can do so. This patch fixes it.
> 
> Fixes: 01b3fd5ac97c ("net: mvpp2: fix detection of 10G SFP modules")
> Cc: Baruch Siach <baruch@...s.co.il>
> Signed-off-by: Antoine Tenart <antoine.tenart@...tlin.com>
> ---
>  drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 14 ++++++++------
>  1 file changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> index 125ea99418df..88aa488054a8 100644
> --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> @@ -4405,12 +4405,14 @@ static void mvpp2_phylink_validate(struct net_device *dev,
>  	case PHY_INTERFACE_MODE_10GKR:
>  	case PHY_INTERFACE_MODE_XAUI:

Are these modes supported on anything except port 0?  If not, you
should be rejecting these, rather than just treating them as RGMII.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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