netdev - Re: [PATCH net] qmi_wwan: Clone the skb when in pass-through mode

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Message-ID: <CAKfDRXhraBRXwaDb6T3XMtGpwK=X2hd8+ONWLSmJhQjGurBMmw@mail.gmail.com>
Date:   Tue, 15 Jun 2021 13:04:02 +0200
From:   Kristian Evensen <kristian.evensen@...il.com>
To:     Bjørn Mork <bjorn@...k.no>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Network Development <netdev@...r.kernel.org>,
        subashab@...eaurora.org
Subject: Re: [PATCH net] qmi_wwan: Clone the skb when in pass-through mode

Hi,

On Tue, Jun 15, 2021 at 12:51 PM Kristian Evensen
<kristian.evensen@...il.com> wrote:
> I think this would be a really nice solution. The same (at least
> FLAG_MULTI_PACKET + usbnet_skb_return) could be applied to pass
> through as well, giving us consistent handling of aggregated packets.
> While we might not save a huge number of lines, I believe the
> resulting code will be easier to understand.

Apologies for the noise. When I check the code again, I see that as
long as FLAG_MULTI_PACKET is set, then we end up with usbnet freeing
the skb (we will always jump to done in rx_process()). So for the
pass-through case, I believe your initial suggestion of having
rx_fixup return 1 is the way to go.

Kristian