diff --git a/drivers/usb/gadget/s3c_udc_otg.c b/drivers/usb/gadget/s3c_udc_otg.c
index ce2494c..b9816df 100644
--- a/drivers/usb/gadget/s3c_udc_otg.c
+++ b/drivers/usb/gadget/s3c_udc_otg.c
@@ -288,7 +288,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 {
 	struct s3c_udc *dev = the_controller;
 	int retval = 0;
-	unsigned long flags;
+	unsigned long flags = 0;
 
 	debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
 
@@ -336,7 +336,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
 	struct s3c_udc *dev = the_controller;
-	unsigned long flags;
+	unsigned long flags = 0;
 
 	if (!dev)
 		return -ENODEV;
@@ -580,7 +580,7 @@ static int s3c_ep_enable(struct usb_ep *_ep,
 {
 	struct s3c_ep *ep;
 	struct s3c_udc *dev;
-	unsigned long flags;
+	unsigned long flags = 0;
 
 	debug("%s: %p\n", __func__, _ep);
 
@@ -644,7 +644,7 @@ static int s3c_ep_enable(struct usb_ep *_ep,
 static int s3c_ep_disable(struct usb_ep *_ep)
 {
 	struct s3c_ep *ep;
-	unsigned long flags;
+	unsigned long flags = 0;
 
 	debug("%s: %p\n", __func__, _ep);
 
@@ -702,7 +702,7 @@ static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 {
 	struct s3c_ep *ep;
 	struct s3c_request *req;
-	unsigned long flags;
+	unsigned long flags = 0;
 
 	debug("%s: %p\n", __func__, _ep);
 
diff --git a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
index 06dfeed..4f69b22 100644
--- a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
+++ b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
@@ -466,7 +466,7 @@ static int s3c_udc_irq(int irq, void *_dev)
 	struct s3c_udc *dev = _dev;
 	u32 intr_status;
 	u32 usb_status, gintmsk;
-	unsigned long flags;
+	unsigned long flags = 0;
 
 	spin_lock_irqsave(&dev->lock, flags);
 
@@ -585,7 +585,7 @@ static int s3c_queue(struct usb_ep *_ep, struct usb_request *_req,
 	struct s3c_request *req;
 	struct s3c_ep *ep;
 	struct s3c_udc *dev;
-	unsigned long flags;
+	unsigned long flags = 0;
 	u32 ep_num, gintsts;
 
 	req = container_of(_req, struct s3c_request, req);
@@ -1033,7 +1033,7 @@ static int s3c_udc_set_halt(struct usb_ep *_ep, int value)
 {
 	struct s3c_ep	*ep;
 	struct s3c_udc	*dev;
-	unsigned long	flags;
+	unsigned long	flags = 0;
 	u8		ep_num;
 
 	ep = container_of(_ep, struct s3c_ep, ep);