linux-kernel - Re: lanana: Add major/minor entries for PPC QE UART devices

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]

Message-ID: <45E5B604.904@freescale.com>
Date:	Wed, 28 Feb 2007 11:04:04 -0600
From:	Timur Tabi <timur@...escale.com>
To:	Dan Malek <dan@...eddedalley.com>
CC:	Segher Boessenkool <segher@...nel.crashing.org>,
	Torben.Mathiasen@...com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-ppc-embedded <linuxppc-embedded@...abs.org>
Subject: Re: lanana: Add major/minor entries for PPC QE UART devices

Dan Malek wrote:

> I don't know the origin of this thread, but none of
> that looks correct.  Today, there can be up to 8
> CPM UART devices, 6 on CPM/CPM2 and 8
> on the QE.  If ttyCPM0 starts at minor 46, they
> should be at least monotonically incrementing
> up to ttyCPM7 with minor 53.

Minor nit: On the QE, they'll be called ttyQE0 through ttyQE7.

I agree that the CPM and the QE should share the same starting minor number, so that 
ttyCPM0 has the same major/minor number as ttyQE0, since it's not possible to have a CPM 
and a QE on the same device.  However, ttyCPM0 is currently assigned to 46, and device 50 
is an Altix serial card.  The only way to give the CPM 6 or 8 slots without moving it is 
to overlap the Altix card.

Now I don't know anything about the Altix card, so I don't know if it's possible to use 
that card on a system with a CPM or a QE.  If it isn't, then I don't know if overlapping 
minor numbers is still a problem.

(Note that the Altix card has a range of 50-81, which is pretty big.)

If we move CPM/QE to 192, then I can change the CPM device driver to reflect that, but I 
don't know what that means for older kernels.

-- 
Timur Tabi
Linux Kernel Developer @ Freescale
-
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/