linux-kernel - Re: [PATCH] r8152: disable rx checksum offload on Dell TB dock

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Message-Id: <B2CA3861-CE7A-46D5-ADB4-85114CFE8E56@canonical.com>
Date:   Fri, 24 Nov 2017 16:57:49 +0800
From:   Kai Heng Feng <kai.heng.feng@...onical.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     David Miller <davem@...emloft.net>, hayeswang@...ltek.co,
        linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        Mario Limonciello <mario.limonciello@...l.com>
Subject: Re: [PATCH] r8152: disable rx checksum offload on Dell TB dock



> On 24 Nov 2017, at 4:28 PM, Greg KH <gregkh@...uxfoundation.org> wrote:
> 
> The bcdDevice is different between the dock device and the "real"
> device, why not use that?

Yea, I’ll poke around and see if bcdDevice alone can be a good predicate.

> Then there is still a bug.  Who as ASMedia is working on this, have they
> posted anything to the linux-usb mailing list about it?

I think they are doing this internally. I’ll advice them to ask questions here if
they encounter any problem.

> Maybe.  Have you tried using usbmon to see what the data streams are for
> the two devices and where they have problems and diverge?  Is the dock
> device doing something different in response to something from the host
> that the "real" device does not do?

No I haven’t.
Not really sure how do debug network packets over USB. I’ll do some research
on the topic.

Kai-Heng