tree 64d21c1cc1073822c594a57e72aececd5248f1f2
parent f400e198b2ed26ce55b22a1412ded0896e7516ac
author Amos Waterland <apw@us.ibm.com> 1159520408 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1159546692 -0700

[PATCH] Chardev checking of overlapping ranges

The code in __register_chrdev_region checks that if the driver wishing to
register has the same major as an existing driver the new minor range is
strictly less than the existing minor range.  However, it does not also
check that the new minor range is strictly greater than the existing minor
range.  That is, if driver X has registered with major=x and minor=0-3,
__register_chrdev_region will allow driver Y to register with major=x and
minor=1-4.

Signed-off-by: Amos Waterland <apw@us.ibm.com>
Cc: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>