netdev - Re: [PATCH net-next v2 07/12] net: dpaa2-eth: use dev_close/open instead of the internal functions

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Date:   Tue, 27 Sep 2022 14:54:58 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Ioana Ciornei <ioana.ciornei@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>, bpf@...r.kernel.org
Subject: Re: [PATCH net-next v2 07/12] net: dpaa2-eth: use dev_close/open
 instead of the internal functions

On Fri, 2022-09-23 at 18:45 +0300, Ioana Ciornei wrote:
> Instead of calling the internal functions which implement .ndo_stop and
> .ndo_open, we can simply call dev_close and dev_open, so that we keep
> the code cleaner.
> 
> Also, in the next patches we'll use the same APIs from other files
> without needing to export the internal functions.
> 
> Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>

This has the not so nice side effect that in case of dev_open() error,
the device will flip status after dpaa2_eth_setup_xdp(). We should try
to avoid that.

I think it's better if you export the helper instead (or even better,
do something more low level-cant-fail like stop the relevant h/w queue,
reconfigure, restart the h/w queue).

Cheers,

Paolo