tty: ipwireless: check ppp register worked

Otherwise we start trying to use a bogus channel - ungood.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/tty/ipwireless/network.c b/drivers/tty/ipwireless/network.c
index 57c8b481113f..d2af155dec8b 100644
--- a/drivers/tty/ipwireless/network.c
+++ b/drivers/tty/ipwireless/network.c
@@ -274,7 +274,12 @@ static void do_go_online(struct work_struct *work_go_online)
                 network->xaccm[0] = ~0U;
                 network->xaccm[3] = 0x60000000U;
                 network->raccm = ~0U;
-                ppp_register_channel(channel);
+                if (ppp_register_channel(channel) < 0) {
+                        printk(KERN_ERR IPWIRELESS_PCCARD_NAME
+                                        ": unable to register PPP channel\n");
+                        kfree(channel);
+                        return;
+                }
                 spin_lock_irqsave(&network->lock, flags);
                 network->ppp_channel = channel;
         }