linux-kernel - Re: [patch 0/2] serial: explicitly request ttyS0-3 for COM1-4

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:	Wed, 16 Jan 2008 12:59:27 -0700
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Russell King <rmk+lkml@....linux.org.uk>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org, Jeff Garzik <jeff@...zik.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [patch 0/2] serial: explicitly request ttyS0-3 for COM1-4

On Wednesday 16 January 2008 11:39:34 am Russell King wrote:
> On Wed, Jan 16, 2008 at 10:05:41AM -0700, Bjorn Helgaas wrote:
> > When 8250_pnp discovers COM ports, we only get the correct ttyS names
> > by accident -- we rely on serial8250_isa_init_ports(), which discovers
> > the COM ports earlier using the addresses in SERIAL_PORT_DFNS.
> 
> It's not by accident but by design.  It's quite intentional that it
> remembers the addresses of serial ports, and if another port is
> registered later with the same base address, it gets the same name.

It's certainly by design that if we register a port twice, it gets
the same name both times.

But that's not quite what I was referring to.  I meant that I don't
think 8250_pnp should depend on the fact that COM1-4 have been
previously discovered to get the right names.

Bjorn
--
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/