diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 6119fb41d736..e2667caefb72 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1557,8 +1557,11 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
 		INIT_LIST_HEAD(&urb->urb_list);
 		atomic_dec(&urb->use_count);
 		atomic_dec(&urb->dev->urbnum);
-		if (atomic_read(&urb->reject))
+		if (atomic_read(&urb->reject)) {
+			pr_info("usb_hcd_submit_urb: wake up kill_urb_queue=%p\n",
+					&usb_kill_urb_queue);
 			wake_up(&usb_kill_urb_queue);
+		}
 		usb_put_urb(urb);
 	}
 	return status;
@@ -1658,8 +1661,11 @@ static void __usb_hcd_giveback_urb(struct urb *urb)
 
 	usb_anchor_resume_wakeups(anchor);
 	atomic_dec(&urb->use_count);
-	if (unlikely(atomic_read(&urb->reject)))
+	if (unlikely(atomic_read(&urb->reject))) {
+		pr_info("%s: wake up kill_urb_queue=%p\n", __func__,
+				&usb_kill_urb_queue);
 		wake_up(&usb_kill_urb_queue);
+	}
 	usb_put_urb(urb);
 }
 
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 30e9e680c74c..70acc648e218 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -60,6 +60,7 @@ static int usb_start_wait_urb(struct urb *urb, int timeout, int *actual_length)
 		goto out;
 
 	expire = timeout ? msecs_to_jiffies(timeout) : MAX_SCHEDULE_TIMEOUT;
+	pr_info("usb_start_wait_urb: urb=%p, expire=%ld\n", urb, expire);
 	if (!wait_for_completion_timeout(&ctx.done, expire)) {
 		usb_kill_urb(urb);
 		retval = (ctx.status == -ENOENT ? -ETIMEDOUT : ctx.status);
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index 357b149b20d3..07cf333e34b4 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -708,6 +708,8 @@ void usb_kill_urb(struct urb *urb)
 	atomic_inc(&urb->reject);
 
 	usb_hcd_unlink_urb(urb, -ENOENT);
+	pr_info("usb_kill_urb: wait for urb=%p, q=%p\n", urb,
+			usb_kill_urb_queue);
 	wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0);
 
 	atomic_dec(&urb->reject);