tree b2f13d50f6ac8f22d849100d507abec22d63be1c
parent d7f8d437bda0ec409e26cffb846bc28a40603ee3
author Dirk Eibach <eibach@gdsys.de> 1244728604 +0100
committer Linus Torvalds <torvalds@linux-foundation.org> 1244735469 -0700

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>