linux-kernel - Re: [PATCH v2 0/3] USB: serial: return errors from break handling

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Date:   Sun, 4 Jun 2023 15:19:16 -0500
From:   Corey Minyard <minyard@....org>
To:     Johan Hovold <johan@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/3] USB: serial: return errors from break handling

On Sun, Jun 04, 2023 at 02:35:02PM +0200, Johan Hovold wrote:
> This series starts returning errors from break handling and also uses
> that mechanism to report to user space when break signalling is not
> supported (e.g. when device or driver support is missing).
> 
> Note that the tty layer currently returns early but without reporting
> errors when a tty driver does not support break signalling. The intent
> expressed in commit 9e98966c7bb9 ("tty: rework break handling") from
> 2008 appears to be to allow missing support to be reported to user
> space however.

This worked as expected for me.

Tested-by: Corey Minyard <cminyard@...sta.com>

> 
> Johan
> 
> 
> Changes in v2
>  - fix return of potentially uninitialised status variable in
>    io_edgeport as reported by kernel test robot <lkp@...el.com> and Dan
>    Carpenter:
> 
>    https://lore.kernel.org/all/202306031014.qzAY3uQ6-lkp@intel.com/
> 
> 
> Johan Hovold (3):
>   USB: serial: return errors from break handling
>   USB: serial: cp210x: disable break signalling on CP2105 SCI
>   USB: serial: report unsupported break signalling
> 
>  drivers/usb/serial/ark3116.c          |  7 +++--
>  drivers/usb/serial/belkin_sa.c        | 12 ++++++---
>  drivers/usb/serial/ch341.c            | 37 +++++++++++++++++----------
>  drivers/usb/serial/cp210x.c           | 14 +++++++---
>  drivers/usb/serial/digi_acceleport.c  |  7 ++---
>  drivers/usb/serial/f81232.c           |  4 ++-
>  drivers/usb/serial/f81534.c           |  4 ++-
>  drivers/usb/serial/ftdi_sio.c         | 10 +++++---
>  drivers/usb/serial/io_edgeport.c      |  6 +++--
>  drivers/usb/serial/io_ti.c            |  9 +++++--
>  drivers/usb/serial/keyspan.c          |  5 +++-
>  drivers/usb/serial/keyspan_pda.c      |  8 ++++--
>  drivers/usb/serial/mct_u232.c         |  6 ++---
>  drivers/usb/serial/mos7720.c          |  9 ++++---
>  drivers/usb/serial/mos7840.c          |  7 ++---
>  drivers/usb/serial/mxuport.c          |  6 ++---
>  drivers/usb/serial/pl2303.c           | 14 ++++++----
>  drivers/usb/serial/quatech2.c         |  8 ++++--
>  drivers/usb/serial/ti_usb_3410_5052.c | 10 +++++---
>  drivers/usb/serial/upd78f0730.c       |  7 +++--
>  drivers/usb/serial/usb-serial.c       |  4 +--
>  drivers/usb/serial/usb_debug.c        | 13 +++++++---
>  drivers/usb/serial/whiteheat.c        |  7 ++---
>  drivers/usb/serial/xr_serial.c        |  4 +--
>  include/linux/usb/serial.h            |  2 +-
>  25 files changed, 147 insertions(+), 73 deletions(-)
> 
> -- 
> 2.39.3
>