usb: gadget: net2280: Fix NULL pointer dereference
When DEBUG is enabled driver->driver.name is accessed, but driver
can be NULL
[ 174.411689] BUG: unable to handle kernel NULL pointer dereference at 0000000000000040
[ 174.429043] RIP: 0010:[<ffffffffa0131ca3>] [<ffffffffa0131ca3>] net2280_stop+0xa3/0x100 [net2280]
[ 174.457910] Call Trace:
[ 174.459503] [<ffffffffa00dd92a>] usb_gadget_remove_driver+0x5a/0xb0 [udc_core]
[ 174.462693] [<ffffffffa00ddd84>] usb_del_gadget_udc+0xb4/0x110 [udc_core]
[ 174.464316] [<ffffffffa012e2bf>] net2280_remove+0x2f/0x1c0 [net2280]
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index 43e5e2f..300b3a7 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -1972,7 +1972,9 @@
device_remove_file (&dev->pdev->dev, &dev_attr_function);
device_remove_file (&dev->pdev->dev, &dev_attr_queues);
- DEBUG (dev, "unregistered driver '%s'\n", driver->driver.name);
+ DEBUG(dev, "unregistered driver '%s'\n",
+ driver ? driver->driver.name : "");
+
return 0;
}