linux-kernel - Re: [PATCH] net: ethernet: ixgbe: don't propagate -ENODEV from ixgbe_mii_bus

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Message-ID: <CAMRc=MexKweGRjF5KNg1saz7NmE+tQq=03oR3wzoMsaTcm+CAA@mail.gmail.com>
Date:   Mon, 12 Oct 2020 14:20:16 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     intel-wired-lan@...ts.osuosl.org, netdev <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Yongxin Liu <yongxin.liu@...driver.com>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH] net: ethernet: ixgbe: don't propagate -ENODEV from ixgbe_mii_bus_init()

On Mon, Sep 28, 2020 at 9:17 AM Bartosz Golaszewski <brgl@...ev.pl> wrote:
>
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
>
> It's a valid use-case for ixgbe_mii_bus_init() to return -ENODEV - we
> still want to finalize the registration of the ixgbe device. Check the
> error code and don't bail out if err == -ENODEV.
>
> This fixes an issue on C3000 family of SoCs where four ixgbe devices
> share a single MDIO bus and ixgbe_mii_bus_init() returns -ENODEV for
> three of them but we still want to register them.
>
> Fixes: 09ef193fef7e ("net: ethernet: ixgbe: check the return value of ixgbe_mii_bus_init()")
> Reported-by: Yongxin Liu <yongxin.liu@...driver.com>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> ---
>  drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> index 2f8a4cfc5fa1..d1623af30125 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> @@ -11032,7 +11032,7 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
>                         true);
>
>         err = ixgbe_mii_bus_init(hw);
> -       if (err)
> +       if (err && err != -ENODEV)
>                 goto err_netdev;
>
>         return 0;
> --
> 2.26.1
>

Hi!

Gentle ping for this patch. Who's picking up networking patches now
that David is OoO? Should I Cc someone else?

Bartosz