From: Xie He <xie.he.0141@gmail.com>
To: Martin Schiller <ms@dev.tdt.de>
Cc: Jakub Kicinski <kuba@kernel.org>,
Leon Romanovsky <leon@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Linux X25 <linux-x25@vger.kernel.org>,
Linux Kernel Network Developers <netdev@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Krzysztof Halasa <khc@pm.waw.pl>,
Jonathan Corbet <corbet@lwn.net>,
linux-doc@vger.kernel.org
Subject: Re: [PATCH net-next RFC v4] net: hdlc_x25: Queue outgoing LAPB frames
Date: Mon, 1 Mar 2021 00:56:37 -0800 [thread overview]
Message-ID: <CAJht_EMG27YU+Jxtb2qeq1nXwu8uV8FXQPr62OcNHsE7DozD1g@mail.gmail.com> (raw)
In-Reply-To: <ff200b159ef358494a922a676cbef8a6@dev.tdt.de>
On Sun, Feb 28, 2021 at 10:56 PM Martin Schiller <ms@dev.tdt.de> wrote:
>
> >> Also, I have a hard time assessing if such a wrap is really
> >> enforceable.
> >
> > Sorry. I don't understand what you mean. What "wrap" are you referring
> > to?
>
> I mean the change from only one hdlc<x> interface to both hdlc<x> and
> hdlc<x>_x25.
>
> I can't estimate how many users are out there and how their setup looks
> like.
I'm also thinking about solving this issue by adding new APIs to the
HDLC subsystem (hdlc_stop_queue / hdlc_wake_queue) for hardware
drivers to call instead of netif_stop_queue / netif_wake_queue. This
way we can preserve backward compatibility.
However I'm reluctant to change the code of all the hardware drivers
because I'm afraid of introducing bugs, etc. When I look at the code
of "wan/lmc/lmc_main.c", I feel I'm not able to make sure there are no
bugs (related to stop_queue / wake_queue) after my change (and even
before my change, actually). There are even serious style problems:
the majority of its lines are indented by spaces.
So I don't want to mess with all the hardware drivers. Hardware driver
developers (if they wish to properly support hdlc_x25) should do the
change themselves. This is not a problem for me, because I use my own
out-of-tree hardware driver. However if I add APIs with no user code
in the kernel, other developers may think these APIs are not
necessary.
next prev parent reply other threads:[~2021-03-01 9:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-16 20:18 [PATCH net-next RFC v4] net: hdlc_x25: Queue outgoing LAPB frames Xie He
2021-02-18 8:57 ` Leon Romanovsky
2021-02-18 9:07 ` Xie He
2021-02-18 10:37 ` Leon Romanovsky
2021-02-18 17:36 ` Xie He
2021-02-18 19:55 ` Leon Romanovsky
2021-02-18 20:06 ` Xie He
2021-02-18 20:23 ` Xie He
2021-02-19 18:39 ` Jakub Kicinski
2021-02-19 20:28 ` Xie He
2021-02-21 6:39 ` Leon Romanovsky
2021-02-21 19:13 ` Xie He
2021-02-22 7:14 ` Martin Schiller
2021-02-22 8:56 ` Xie He
2021-02-26 14:20 ` Martin Schiller
2021-02-26 23:03 ` Xie He
2021-03-01 6:56 ` Martin Schiller
2021-03-01 8:56 ` Xie He [this message]
2021-03-02 7:04 ` Martin Schiller
2021-03-02 23:30 ` Jakub Kicinski
2021-03-03 13:26 ` Martin Schiller
2021-03-03 20:23 ` Xie He
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