linux-kernel - Re: [patch] serial: add parameter to force skipping the test for the TXEN bug

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Date:	Thu, 23 Apr 2009 17:04:45 -0400
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	alan@...rguk.ukuu.org.uk, linux-kernel@...r.kernel.org
Subject: Re: [patch] serial: add parameter to force skipping the test for
 the TXEN bug

On Tue, 21 Apr 2009 12:47:45 -0700
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Mon, 20 Apr 2009 18:05:49 -0400
> Chuck Ebbert <cebbert@...hat.com> wrote:
> 
> > serial: add parameter to force skipping the test for the TXEN bug
> > 
> > Allow users to force skipping the TXEN test at init time. Applies
> > to all serial ports. Intended for debugging only.
> > 
> 
> <scratches head @ changelog>
> 
> 
> Why is this useful?  What is the problem which you're solving here?

There is a blacklist for devices where we need to skip the test but the list is
not complete. This lets users force skipping the test so we can determine if they
need to be added to the list.

Some HP machines with weird serial consoles have this problem and there may be more.

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