]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
char: moxa, prevent opening unavailable ports
authorDirk Eibach <eibach@gdsys.de>
Thu, 18 Jun 2009 23:49:15 +0000 (16:49 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 19 Jun 2009 23:46:06 +0000 (16:46 -0700)
commita90b037583d5f1ae3e54e9c687c79df82d1d34a4
treea399772347bfa16ba9ee76caa9a14105987b8c01
parent0b9ce5a20138590bd9556e34a0408164fadf4163
char: 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.

[akpm@linux-foundation.org: avoid multiple returns]
Signed-off-by: Dirk Eibach <eibach@gdsys.de>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/char/moxa.c