linux-kernel - Re: [PATCH v2] usb: serial: Repair FTDI FT232R bricked eeprom

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Message-ID: <CADvTj4q+b6nLBV6LEdd6K-daNbhTf6rUMOYnj+p0FO6+NTCg7A@mail.gmail.com>
Date:   Thu, 10 Sep 2020 00:48:07 -0600
From:   James Hilliard <james.hilliard1@...il.com>
To:     Lars Melin <larsm17@...il.com>
Cc:     Oliver Neukum <oneukum@...e.de>, linux-usb@...r.kernel.org,
        Johan Hovold <johan@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Russ Dill <Russ.Dill@...il.com>,
        Hector Martin <hector@...cansoft.com>
Subject: Re: [PATCH v2] usb: serial: Repair FTDI FT232R bricked eeprom

On Wed, Sep 9, 2020 at 11:34 PM Lars Melin <larsm17@...il.com> wrote:
>
> On 9/10/2020 10:02, Oliver Neukum wrote:
> > Am Mittwoch, den 09.09.2020, 13:34 -0600 schrieb James Hilliard:
> >> This patch detects and reverses the effects of the malicious FTDI
> >> Windows driver version 2.12.00(FTDIgate).
> >
> > Hi,
> >
> > this raises questions.
> > Should we do this unconditionally without asking?
> > Does this belong into kernel space?
> >
>
> My answer to both of those question is a strong NO.
>
> The patch author tries to justify the patch with egoistical arguments
> (easier for him and his customers) without thinking of all other users
> of memory constrained embedded hardware that doesn't need the patch code
> but have to carry it.
If that's a concern it would not be difficult to add a kconfig option to allow
disabling it.
>
> The bricked PID is btw already supported by the linux ftdi driver so
> there is no functionality gain in the patch.
By the kernel driver sure, but userspace is where things get messed up
without something like this.
>
> br
> Lars
>
>
>