linux-kernel - Re: [PATCH] Add the ability to layer another driver over the serial driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 11 Dec 2006 11:07:50 -0600
From:	Corey Minyard <cminyard@...sta.com>
To:	Tilman Schmidt <tilman@...p.cc>
Cc:	Alan <alan@...rguk.ukuu.org.uk>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	linux-serial@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Hansjoerg Lipp <hjlipp@....de>, Russell Doty <rdoty@...hat.com>
Subject: Re: [PATCH] Add the ability to layer another driver over the serial
 driver

Tilman Schmidt wrote:
> On Mon, 11 Dec 2006 10:20:16 +0000, Alan wrote:
>   
>> This looks wrong. You already have a kernel interface to serial drivers.
>> It is called a line discipline. We use it for ppp, we use it for slip, we
>> use it for a few other things such as attaching sync drivers to some
>> devices.
>>     
>
> I was under the impression that line disciplines need a user space
> process to open the serial device and push them onto it. Is there
> a way for a driver to attach to a serial port through the line
> discipline interface from kernel space, eg. from an initialization,
> module load, or probe function?
>   
Module initialization functions run in a task context, so that's
generally not a problem.  The probe function depends on the driver,
I guess, but most I have seen are in task context.

-Corey

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/