USB: pxa27x_udc: typo fixes and code cleanups

This patch is a merge of patches :
 - fix function doc and debug
 - cleanup loop count
 - optimize code to remove local variable and extra check
 - init 'req' before use
 - add missing iounmap call

[dbrownell@users.sourceforge.net: capitalize IN/OUT directions in doc]

Signed-off-by: Vernon Sauder <vsauder@inhand.com>
[folded by Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 24 insertions, 30 deletions

diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 91ba1e939475..8cc676ecbb23 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -748,13 +748,13 @@ static void req_done(struct pxa_ep *ep, struct pxa27x_request *req, int status)
 }
 
 /**
- * ep_end_out_req - Ends control endpoint in request
+ * ep_end_out_req - Ends endpoint OUT request
  * @ep: physical endpoint
  * @req: pxa request
  *
  * Context: ep->lock held
  *
- * Ends endpoint in request (completes usb request).
+ * Ends endpoint OUT request (completes usb request).
  */
 static void ep_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req)
 {
@@ -763,13 +763,13 @@ static void ep_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req)
 }
 
 /**
- * ep0_end_out_req - Ends control endpoint in request (ends data stage)
+ * ep0_end_out_req - Ends control endpoint OUT request (ends data stage)
  * @ep: physical endpoint
  * @req: pxa request
  *
  * Context: ep->lock held
  *
- * Ends control endpoint in request (completes usb request), and puts
+ * Ends control endpoint OUT request (completes usb request), and puts
  * control endpoint into idle state
  */
 static void ep0_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req)
@@ -780,13 +780,13 @@ static void ep0_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req)
 }
 
 /**
- * ep_end_in_req - Ends endpoint out request
+ * ep_end_in_req - Ends endpoint IN request
  * @ep: physical endpoint
  * @req: pxa request
  *
  * Context: ep->lock held
  *
- * Ends endpoint out request (completes usb request).
+ * Ends endpoint IN request (completes usb request).
  */
 static void ep_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req)
 {
@@ -795,20 +795,18 @@ static void ep_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req)
 }
 
 /**
- * ep0_end_in_req - Ends control endpoint out request (ends data stage)
+ * ep0_end_in_req - Ends control endpoint IN request (ends data stage)
  * @ep: physical endpoint
  * @req: pxa request
  *
  * Context: ep->lock held
  *
- * Ends control endpoint out request (completes usb request), and puts
+ * Ends control endpoint IN request (completes usb request), and puts
  * control endpoint into status state
  */
 static void ep0_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req)
 {
-        struct pxa_udc *udc = ep->dev;
-
-        set_ep0state(udc, IN_STATUS_STAGE);
+        set_ep0state(ep->dev, IN_STATUS_STAGE);
         ep_end_in_req(ep, req);
 }
 
@@ -1168,7 +1166,7 @@ static int pxa_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
                                 ep_end_in_req(ep, req);
                         } else {
                                 ep_err(ep, "got a request of %d bytes while"
-                                        "in state WATI_ACK_SET_CONF_INTERF\n",
+                                        "in state WAIT_ACK_SET_CONF_INTERF\n",
                                         length);
                                 ep_del_request(ep, req);
                                 rc = -EL2HLT;
@@ -1214,30 +1212,26 @@ static int pxa_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
         struct udc_usb_ep       *udc_usb_ep;
         struct pxa27x_request   *req;
         unsigned long           flags;
-        int                     rc;
+        int                     rc = -EINVAL;
 
         if (!_ep)
-                return -EINVAL;
+                return rc;
         udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep);
         ep = udc_usb_ep->pxa_ep;
         if (!ep || is_ep0(ep))
-                return -EINVAL;
+                return rc;
 
         spin_lock_irqsave(&ep->lock, flags);
 
         /* make sure it's actually queued on this endpoint */
         list_for_each_entry(req, &ep->queue, queue) {
-                if (&req->req == _req)
+                if (&req->req == _req) {
+                        req_done(ep, req, -ECONNRESET);
+                        rc = 0;
                         break;
+                }
         }
 
-        rc = -EINVAL;
-        if (&req->req != _req)
-                goto out;
-
-        rc = 0;
-        req_done(ep, req, -ECONNRESET);
-out:
         spin_unlock_irqrestore(&ep->lock, flags);
         return rc;
 }
@@ -1706,10 +1700,9 @@ static __init void udc_init_data(struct pxa_udc *dev)
         }
 
         /* USB endpoints init */
-        for (i = 0; i < NR_USB_ENDPOINTS; i++)
-                if (i != 0)
-                        list_add_tail(&dev->udc_usb_ep[i].usb_ep.ep_list,
-                                        &dev->gadget.ep_list);
+        for (i = 1; i < NR_USB_ENDPOINTS; i++)
+                list_add_tail(&dev->udc_usb_ep[i].usb_ep.ep_list,
+                                &dev->gadget.ep_list);
 }
 
 /**
@@ -1994,14 +1987,14 @@ static void handle_ep0(struct pxa_udc *udc, int fifo_irq, int opc_irq)
         struct pxa27x_request   *req = NULL;
         int                     completed = 0;
 
+        if (!list_empty(&ep->queue))
+                req = list_entry(ep->queue.next, struct pxa27x_request, queue);
+
         udccsr0 = udc_ep_readl(ep, UDCCSR);
         ep_dbg(ep, "state=%s, req=%p, udccsr0=0x%03x, udcbcr=%d, irq_msk=%x\n",
                 EP0_STNAME(udc), req, udccsr0, udc_ep_readl(ep, UDCBCR),
                 (fifo_irq << 1 | opc_irq));
 
-        if (!list_empty(&ep->queue))
-                req = list_entry(ep->queue.next, struct pxa27x_request, queue);
-
         if (udccsr0 & UDCCSR0_SST) {
                 ep_dbg(ep, "clearing stall status\n");
                 nuke(ep, -EPIPE);
@@ -2473,6 +2466,7 @@ static int __exit pxa_udc_remove(struct platform_device *_dev)
         platform_set_drvdata(_dev, NULL);
         the_controller = NULL;
         clk_put(udc->clk);
+        iounmap(udc->regs);
 
         return 0;
 }