1 files changed, 13 insertions, 8 deletions

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 83428f56253b..9a0c3979ff43 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -71,6 +71,9 @@
 /******************************************************************************
  * DEFINE
  *****************************************************************************/
+
+#define DMA_ADDR_INVALID        (~(dma_addr_t)0)
+
 /* ctrl register bank access */
 static DEFINE_SPINLOCK(udc_lock);
 
@@ -1434,7 +1437,7 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
                 return -EALREADY;
 
         mReq->req.status = -EALREADY;
-        if (length && !mReq->req.dma) {
+        if (length && mReq->req.dma == DMA_ADDR_INVALID) {
                 mReq->req.dma = \
                         dma_map_single(mEp->device, mReq->req.buf,
                                        length, mEp->dir ? DMA_TO_DEVICE :
@@ -1453,7 +1456,7 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
                                 dma_unmap_single(mEp->device, mReq->req.dma,
                                         length, mEp->dir ? DMA_TO_DEVICE :
                                         DMA_FROM_DEVICE);
-                                mReq->req.dma = 0;
+                                mReq->req.dma = DMA_ADDR_INVALID;
                                 mReq->map     = 0;
                         }
                         return -ENOMEM;
@@ -1549,7 +1552,7 @@ static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
         if (mReq->map) {
                 dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
                                  mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-                mReq->req.dma = 0;
+                mReq->req.dma = DMA_ADDR_INVALID;
                 mReq->map     = 0;
         }
 
@@ -1610,7 +1613,6 @@ __acquires(mEp->lock)
  * @gadget: gadget
  *
  * This function returns an error code
- * Caller must hold lock
  */
 static int _gadget_stop_activity(struct usb_gadget *gadget)
 {
@@ -2189,6 +2191,7 @@ static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
         mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
         if (mReq != NULL) {
                 INIT_LIST_HEAD(&mReq->queue);
+                mReq->req.dma = DMA_ADDR_INVALID;
 
                 mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
                                            &mReq->dma);
@@ -2328,7 +2331,7 @@ static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
         if (mReq->map) {
                 dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
                                  mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-                mReq->req.dma = 0;
+                mReq->req.dma = DMA_ADDR_INVALID;
                 mReq->map     = 0;
         }
         req->status = -ECONNRESET;
@@ -2500,12 +2503,12 @@ static int ci13xxx_wakeup(struct usb_gadget *_gadget)
         spin_lock_irqsave(udc->lock, flags);
         if (!udc->remote_wakeup) {
                 ret = -EOPNOTSUPP;
-                dbg_trace("remote wakeup feature is not enabled\n");
+                trace("remote wakeup feature is not enabled\n");
                 goto out;
         }
         if (!hw_cread(CAP_PORTSC, PORTSC_SUSP)) {
                 ret = -EINVAL;
-                dbg_trace("port is not suspended\n");
+                trace("port is not suspended\n");
                 goto out;
         }
         hw_cwrite(CAP_PORTSC, PORTSC_FPR, PORTSC_FPR);
@@ -2703,7 +2706,9 @@ static int ci13xxx_stop(struct usb_gadget_driver *driver)
                 if (udc->udc_driver->notify_event)
                         udc->udc_driver->notify_event(udc,
                         CI13XXX_CONTROLLER_STOPPED_EVENT);
+                spin_unlock_irqrestore(udc->lock, flags);
                 _gadget_stop_activity(&udc->gadget);
+                spin_lock_irqsave(udc->lock, flags);
                 pm_runtime_put(&udc->gadget.dev);
         }
 
@@ -2850,7 +2855,7 @@ static int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
         struct ci13xxx *udc;
         int retval = 0;
 
-        trace("%p, %p, %p", dev, regs, name);
+        trace("%p, %p, %p", dev, regs, driver->name);
 
         if (dev == NULL || regs == NULL || driver == NULL ||
                         driver->name == NULL)