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Message-ID: <3d994c05-492d-f9f4-161d-123a68d4e87a@gmail.com>
Date:   Tue, 4 Apr 2023 09:55:53 +0700
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Subject: Re: [PATCH v7] tty: fix hang on tty device with no_room set
From:   Bagas Sanjaya <bagasdotme@gmail.com>
To:     juanfengpy@gmail.com
Cc:     Hui Li <caelli@tencent.com>, stable@vger.kernel.org,
        =?UTF-8?Q?Ilpo_J=c3=a4rvinen?= <ilpo.jarvinen@linux.intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
References: <1679019847-1401-1-git-send-email-caelli@tencent.com>
 <ZCuQO3A6FX305KTJ@debian.me>
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On 4/4/23 09:49, Bagas Sanjaya wrote:
> On Fri, Mar 17, 2023 at 10:24:07AM +0800, juanfengpy@gmail.com wrote:
>> We have met a hang on pty device, the reader was blocking
>> at epoll on master side, the writer was sleeping at wait_woken
>> inside n_tty_write on slave side, and the write buffer on
>> tty_port was full, we found that the reader and writer would
>> never be woken again and blocked forever.
> 
> Where do you find this hanging pty? Seems like the wording makes me
> confused. Maybe you mean "It is possible to hang pty device. In that
> case, ..."
> 

Oops, I forgot to Cc: LKML.

-- 
An old man doll... just what I always wanted! - Clara