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    SubjectRE: [PATCH v3] usb-serial:cp210x: add support to software flow control
    Date
    Hi Johan,

    Thanks for your reminding. I am adjusting patch according to the latest Linux Master branch.

    With best regards,
    Wang Sheng Long
    Siemens Ltd., China
    RC-CN DI FA R&D SW
    Tianyuan road No.99
    611731 CHENGDU, China
    Mobil: +86 15281074996
    mailto:shenglong.wang.ext@siemens.com



    -----Original Message-----
    From: Johan Hovold <johan@kernel.org>
    Sent: Monday, August 24, 2020 5:10 PM
    To: Kiszka, Jan (CT RDA IOT SES-DE) <jan.kiszka@siemens.com>
    Cc: Sheng Long Wang <china_shenglong@163.com>; Wang, Sheng Long (EXT) (RC-CN DI FA R&D SW) <shenglong.wang.ext@siemens.com>; johan@kernel.org; gregkh@linuxfoundation.org; linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org
    Subject: Re: [PATCH v3] usb-serial:cp210x: add support to software flow control

    On Fri, Aug 21, 2020 at 07:32:58AM +0200, Jan Kiszka wrote:
    > On 20.08.20 09:52, Sheng Long Wang wrote:
    > > From: Wang Sheng Long <shenglong.wang.ext@siemens.com>
    > >
    > > When data is transmitted between two serial ports, the phenomenon of
    > > data loss often occurs. The two kinds of flow control commonly used
    > > in serial communication are hardware flow control and software flow
    > > control.
    > >
    > > In serial communication, If you only use RX/TX/GND Pins, you can't
    > > do hardware flow. So we often used software flow control and prevent
    > > data loss. The user sets the software flow control through the
    > > application program, and the application program sets the software
    > > flow control mode for the serial port chip through the driver.
    > >
    > > For the cp210 serial port chip, its driver lacks the software flow
    > > control setting code, so the user cannot set the software flow
    > > control function through the application program. This adds the
    > > missing software flow control.
    > >
    > > Signed-off-by: Wang Sheng Long <shenglong.wang.ext@siemens.com>
    > >
    > > Changes in v3:
    > > -fixed code style, It mainly adjusts the code style acccording to
    > > kernel specification.
    >
    > Patch does not apply. You forgot to rebase over latest tty/tty-next or
    > linux master.

    That should be the usb-next branch of the usb-serial tree:

    https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial.git/

    or linux-next (or, currently, Linus's master branch).

    You can use "scripts/get_maintainer.sh --scm" to determine which tree to base your work against.

    Johan

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