tree fa0cb94ef17f7e234afd1d890e8761f4090cdb43
parent de90525fbe776d0faa3073aec11e6718eced518e
author Chengguang Xu <cgxu519@gmx.com> 1550233631 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1559310509 -0700

chardev: add additional check for minor range overlap

[ Upstream commit de36e16d1557a0b6eb328bc3516359a12ba5c25c ]

Current overlap checking cannot correctly handle
a case which is baseminor < existing baseminor &&
baseminor + minorct > existing baseminor + minorct.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>