linux-kernel - Re: [patch 1/2] staging: speakup: add function to convert dev name to number

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Date:   Sat, 17 Jun 2017 11:16:44 +0100
From:   Okash Khawaja <okash.khawaja@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Samuel Thibault <samuel.thibault@...-lyon.org>,
        Jiri Slaby <jslaby@...e.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        devel@...verdev.osuosl.org, Kirk Reiser <kirk@...sers.ca>,
        speakup@...ux-speakup.org, Chris Brannon <chris@...-brannons.com>
Subject: Re: [patch 1/2] staging: speakup: add function to convert dev name
 to number

Hi,

On Thu, Jun 15, 2017 at 07:52:51AM +0100, Okash Khawaja wrote:
> On Wed, Jun 14, 2017 at 03:04:18PM +0200, Greg Kroah-Hartman wrote: 
> > The console stuff is odd though, but that is each driver defining the
> > name for itself, major/minor does not apply.  Also, a separate driver is
> > not having to figure this all out.  I wonder if we could just add a tty
> > core function for this as it does know the name of everything that has
> > been registered with it, right?
> 
> I can start working on a patch for this. I'm still new to the tty code
> so will follow up with any questions I might have.

I've put together this function for converting device name to number.
It traverses tty_drivers list looking for corresponding dev name and
index. Is this the right approach?

Thanks,
Okash

View attachment "X_tty_dev_name_to_number" of type "text/plain" (2283 bytes)