auxdisplay: ks0108: fix refcount
authorSudip Mukherjee <sudipm.mukherjee@gmail.com>
Mon, 20 Jul 2015 11:57:21 +0000 (17:27 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 5 Aug 2015 20:36:48 +0000 (13:36 -0700)
commitbab383de3b84e584b0f09227151020b2a43dc34c
treed638c1a43014ebd181af4d2fdc8d4961fe5b08bb
parentd25ded8d3c6ecc3043763d4330c964603dc61bd4
auxdisplay: ks0108: fix refcount

parport_find_base() will implicitly do parport_get_port() which
increases the refcount. Then parport_register_device() will again
increment the refcount. But while unloading the module we are only
doing parport_unregister_device() decrementing the refcount only once.
We add an parport_put_port() to neutralize the effect of
parport_get_port().

Cc: <stable@vger.kernel.org> # 2.6.32+
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/auxdisplay/ks0108.c