From: Dirk Eibach <eibach@gdsys.de>
Date: Thu, 11 Jun 2009 13:56:44 +0000 (+0100)
Subject: moxa: prevent opening unavailable ports
X-Git-Tag: v2.6.31-rc1~399^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0e8527726b9e56649b9eafde3bc0fbc4dd2dd47;p=pandora-kernel.git

moxa: prevent opening unavailable ports

In moxa.c there are 32 minor numbers reserved for each device. The
number of ports actually available per device is stored in
moxa_board_conf->numPorts. This number is not considered in moxa_open().
Opening a port that is not available results in a kernel oops.
This patch adds a test to moxa_open() that prevents opening unavailable
ports.

Signed-off-by: Dirk Eibach <eibach@gdsys.de>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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