diff --git a/dde_linux/src/lib/usb/include/signal.h b/dde_linux/src/lib/usb/include/signal.h
index bf3e2ea8b0..8b3d0e4f0f 100644
--- a/dde_linux/src/lib/usb/include/signal.h
+++ b/dde_linux/src/lib/usb/include/signal.h
@@ -116,7 +116,6 @@ namespace Irq
 {
 	void init(Genode::Signal_receiver *recv);
 	void check_irq();
-	void wait_for_irq();
 }
 
 namespace Event
diff --git a/dde_linux/src/lib/usb/nic/nic.cc b/dde_linux/src/lib/usb/nic/nic.cc
index 41e986d29d..c5f78fa17f 100644
--- a/dde_linux/src/lib/usb/nic/nic.cc
+++ b/dde_linux/src/lib/usb/nic/nic.cc
@@ -98,8 +98,9 @@ class Skb
 			
 
 			/* wait until some SKBs are freed */
-			for (_wait_free = false; !_wait_free;)
-				Irq::wait_for_irq();
+			_wait_free = false;
+			//PDBG("wait for free skbs ...");
+			_wait_event(_wait_free);
 
 			return alloc();
 		}
diff --git a/dde_linux/src/lib/usb/signal/irq.cc b/dde_linux/src/lib/usb/signal/irq.cc
index c5debb4062..e75aa37755 100644
--- a/dde_linux/src/lib/usb/signal/irq.cc
+++ b/dde_linux/src/lib/usb/signal/irq.cc
@@ -22,7 +22,6 @@ extern "C" {
 /* our local incarnation of sender and receiver */
 static Signal_helper *_signal = 0;
 static Genode::Lock   _irq_sync(Genode::Lock::LOCKED);
-static Genode::Lock   _irq_wait(Genode::Lock::LOCKED);
 
 /**
  * This contains the Linux-driver handlers
@@ -81,9 +80,6 @@ class Irq_context : public Driver_context,
 			static Genode::Lock handler_lock;
 			Genode::Lock::Guard guard(handler_lock);
 
-			/* unlock if main thread is waiting */
-			_irq_wait.unlock();
-
 			Irq_context *ctx = static_cast<Irq_context *>(irq);
 
 			/* set context & submit signal */
@@ -124,7 +120,7 @@ class Irq_context : public Driver_context,
 			/* report IRQ to all clients */
 			for (Irq_handler *h = _handler_list.first(); h; h = h->next()) {
 
-				if ((handled = _handle_one(h)))
+				if (_handle_one(h))
 					break;
 
 				dde_kit_log(DEBUG_IRQ, "IRQ: %u ret: %u h: %p dev: %p", _irq, handled, h->handler, h->dev);
@@ -195,13 +191,6 @@ void Irq::check_irq()
 }
 
 
-void Irq::wait_for_irq()
-{
-	while (!Irq_context::check_irq())
-		_irq_wait.lock();
-}
-
-
 /***********************
  ** linux/interrupt.h **
  ***********************/