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>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/auxdisplay/ks0108.c b/drivers/auxdisplay/ks0108.c
index 5b93852392b8..0d752851a1ee 100644
--- a/drivers/auxdisplay/ks0108.c
+++ b/drivers/auxdisplay/ks0108.c
@@ -139,6 +139,7 @@ static int __init ks0108_init(void)
 
         ks0108_pardevice = parport_register_device(ks0108_parport, KS0108_NAME,
                 NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
+        parport_put_port(ks0108_parport);
         if (ks0108_pardevice == NULL) {
                 printk(KERN_ERR KS0108_NAME ": ERROR: "
                         "parport didn't register new device\n");