netdev - Re: [patch net-next RFC 00/10] introduce line card support for modular switch

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Message-ID: <CAKOOJTwmaqvPrF2Dr_ZqozysOUJUKuJdGgJ7xK2f66FCHXfyvg@mail.gmail.com>
Date:   Mon, 18 Jan 2021 15:40:47 -0800
From:   Edwin Peer <edwin.peer@...adcom.com>
To:     David Ahern <dsahern@...il.com>
Cc:     Jiri Pirko <jiri@...nulli.us>, netdev <netdev@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jacob Keller <jacob.e.keller@...el.com>, roopa@...dia.com,
        mlxsw <mlxsw@...dia.com>
Subject: Re: [patch net-next RFC 00/10] introduce line card support for
 modular switch

On Mon, Jan 18, 2021 at 2:57 PM David Ahern <dsahern@...il.com> wrote:

> On 1/18/21 11:01 AM, Edwin Peer wrote:
> > I'm facing a similar issue with NIC firmware that isn't yet ready by
> > device open time, but have been resisting the urge to lie to the stack
>
> why not have the ndo_open return -EBUSY or -EAGAIN to tell S/W to try
> again 'later'?

Indeed, this is what we ended up doing, although we still need to
confirm Network Manager, systemd and whatever else our customers might
use do the necessary to satisfy the user requirement to handle the
delayed init.

Only reason I piped up is that this line card thing seems to introduce
a similar issue.

Regards,
Edwin Peer

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