linux-kernel - Re: [patch v2 6/6] staging: speakup: flush tty buffers and ensure hardware flow control

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Date:   Tue, 16 May 2017 13:51:35 +0100
From:   Okash Khawaja <okash.khawaja@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Jiri Slaby <jslaby@...e.com>,
        Samuel Thibault <samuel.thibault@...-lyon.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        Kirk Reiser <kirk@...sers.ca>,
        "Speakup is a screen review system for Linux." 
        <speakup@...ux-speakup.org>, John Covici <covici@....covici.com>,
        Chris Brannon <chris@...-brannons.com>
Subject: Re: [patch v2 6/6] staging: speakup: flush tty buffers and ensure hardware flow control


> On 16 May 2017, at 13:28, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> 
>> On Tue, May 16, 2017 at 01:19:10PM +0100, Okash Khawaja wrote:
>> Hi,
>> 
>> On Tue, May 16, 2017 at 1:00 PM, Greg Kroah-Hartman
>> <gregkh@...uxfoundation.org> wrote:
>>> On Mon, May 15, 2017 at 06:45:37PM +0100, Okash Khawaja wrote:
>>>> This patch fixes the issue where TTY-migrated synths would take a while to shut up after hitting numpad enter key. When calling synth_flush, even though XOFF character is sent as high priority, data buffered in TTY layer is still sent to the synth. This patch flushes that buffered data when synth_flush is called.
>>> 
>>> Minor nit, please line-wrap your changelog text at 72 columns so that I
>>> don't have to do it "by hand".
>> Sure, will do.
>> 
>>> 
>>>> 
>>>> It also tries to ensure that hardware flow control is enabled, by setting CRTSCTS using tty's termios.
>>>> 
>>>> Reported-by: John Covici <covici@....covici.com>
>>>> Signed-off-by: Okash Khawaja <okash.khawaja@...il.com>
>>>> Reviewed-by: Samuel Thibault <samuel.thibault@...-lyon.org>
>>>> 
>>>> Index: linux-staging/drivers/staging/speakup/serialio.c
>>>> ===================================================================
>>> 
>>> Are you using git?  These lines are odd...
>> They come from quilt. Haven't checked yet if there is an option to
>> turn them off.
> 
> There is, here's what is in my .quiltrc:
> 
> QUILT_REFRESH_ARGS="--diffstat --strip-trailing-whitespace --no-timestamps --no-index --sort -p1 -p ab"
> QUILT_DIFF_ARGS="--no-timestamps --no-index --sort --color=auto -p ab"
> QUILT_DIFF_OPTS="-p"
> 
> That will give you the diffstat in the patch as well, which is always
> helpful to reviewers.

Thanks very much. Will update mine.