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Date: Mon, 29 Jul 2002 19:54:14 -0700 (PDT)
Message-Id: <20020729.195414.31386335.davem@redhat.com>
To: remco@rvt.com
Cc: dan@embeddededge.com, benh@kernel.crashing.org, trini@kernel.crashing.org,
       rmk@arm.linux.org.uk, linux-kernel@vger.kernel.org,
       linuxppc-dev@lists.linuxppc.org
Subject: Re: 3 Serial issues up for discussion
From: "David S. Miller" <davem@redhat.com>
In-Reply-To: <200207291246.43134.remco@rvt.com>
References: <20020729181352.27999@192.168.4.1>
	<3D4592D3.50505@embeddededge.com>
	<200207291246.43134.remco@rvt.com>
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   From: Remco Treffkorn <remco@rvt.com>
   Date: Mon, 29 Jul 2002 12:46:42 -0700
   
   Drivers need not fight about minor numbers. That can be simply handled:
   
   int get_new_serial_minor()
   {
       static int minor;
   
       return minor++;
   }
   
   Any serial driver can call this when it initializes a new uart.
   Hot pluggable drivers have to hang on to their minors, and
   re-use.

I don't think it's wise to make hot-plug drivers keep track
of the minors they ever use in such a sloppy way.  Why not
make the get_new_serial_minor() thing have a release method
too and then we can keep track of minor allocation in one
place.

Also if I remmove the module for a serial port driver, those minors
should get reused by the next registered uart too.

Finally we can name this all /dev/serialXXX in keeping with Linus's
grand view of /dev/diskXXX et al. (and keeping ttySfoo around for
compat sake for a little while of course :).
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