usbmon: Smooth the core code

Two things:
 - mbus can be NULL (in case of bus removal while reader is reading)
 - Remove a useless assignment

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/mon/mon_main.c b/drivers/usb/mon/mon_main.c
index e58f761..2e317bd 100644 (file)
--- a/drivers/usb/mon/mon_main.c
+++ b/drivers/usb/mon/mon_main.c
@@ -148,18 +148,8 @@ static void mon_complete(struct usb_bus *ubus, struct urb *urb)
 {
        struct mon_bus *mbus;
 
-       mbus = ubus->mon_bus;
-       if (mbus == NULL) {
-               /*
-                * This should not happen.
-                * At this point we do not even know the bus number...
-                */
-               printk(KERN_ERR TAG ": Null mon bus in URB, address %p\n",
-                   urb);
-               return;
-       }
-
-       mon_bus_complete(mbus, urb);
+       if ((mbus = ubus->mon_bus) != NULL)
+               mon_bus_complete(mbus, urb);
        mon_bus_complete(&mon_bus0, urb);
 }
 
@@ -170,7 +160,7 @@ static void mon_complete(struct usb_bus *ubus, struct urb *urb)
  */
 static void mon_stop(struct mon_bus *mbus)
 {
-       struct usb_bus *ubus = mbus->u_bus;
+       struct usb_bus *ubus;
        struct list_head *p;
 
        if (mbus == &mon_bus0) {