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>

diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 91ba1e9..8cc676e 100644 (file)
--- 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;
 }