hso modem detect fix patch against Alan Cox'es tty tree

Fixed incorrect check for the modem port, this prevents
crashes caused by issueing a tiocmget_submit_urb
on endpoints which don't exist for non modem devices.

Signed-off-by: Denis Joseph Barrow <D.Barow@option.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index d974d97..148af34 100644 (file)
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -2663,7 +2663,7 @@ static struct hso_device *hso_create_bulk_serial_device(
        serial->parent = hso_dev;
        hso_dev->port_data.dev_serial = serial;
 
-       if (port & HSO_PORT_MODEM) {
+       if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
                num_urbs = 2;
                serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
                                           GFP_KERNEL);