staging: ft1000: extract helper handle_misc_portid()

The function ft1000_poll, in ft1000_hw.c, is complex, with deep levels
of nesting, unnecessary variables, and style issues. Extract the default
case of the switch statement to its own function, handle_misc_portid.
Make the variable struct dpram_blk *pdpram_blk local to the new function
and remove it from the old. The variable struct pseudo_hdr *ppseudo_hdr is
used only once, to access a member of another struct, so eliminate it
and access the member directly. Return -1 in all the places where the
code fails, and 0 on successful completion. Fix coding style errors.

Signed-off-by: Kelley Nielsen <kelleynnn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
index 52e6b18..95ea5c4 100644 (file)
--- a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
+++ b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
@@ -1480,6 +1480,54 @@ static int dsp_broadcast_msg_id(struct ft1000_usb *dev)
        return 0;
 }
 
+static int handle_misc_portid(struct ft1000_usb *dev)
+{
+       struct dpram_blk *pdpram_blk;
+       int i;
+
+       pdpram_blk = ft1000_get_buffer(&freercvpool);
+       if (pdpram_blk != NULL) {
+               if (ft1000_receive_cmd(dev, pdpram_blk->pbuffer,
+                                       MAX_CMD_SQSIZE)) {
+                       /* Search for correct application block */
+                       for (i = 0; i < MAX_NUM_APP; i++) {
+                               if (dev->app_info[i].app_id
+                                               == ((struct pseudo_hdr *)
+                                               pdpram_blk->pbuffer)
+                                               ->portdest)
+                                       break;
+                               return -1;
+                       }
+                       if (i == MAX_NUM_APP) {
+                               DEBUG("FT1000:ft1000_parse_dpram_msg: No application matching id = %d\n", ((struct pseudo_hdr *)pdpram_blk->pbuffer)->portdest);
+                               ft1000_free_buffer(pdpram_blk, &freercvpool);
+                       } else {
+                               if (dev->app_info[i].NumOfMsg > MAX_MSG_LIMIT) {
+                                       ft1000_free_buffer(pdpram_blk,
+                                                       &freercvpool);
+                                       return -1;
+                               } else {
+                                       dev->app_info[i].nRxMsg++;
+                                       /* Put message into the appropriate
+                                        * application block
+                                        * */
+                                       list_add_tail(&pdpram_blk->list,
+                                                       &dev->app_info[i]
+                                                       .app_sqlist);
+                                       dev->app_info[i].NumOfMsg++;
+                               }
+                       }
+               } else {
+                       ft1000_free_buffer(pdpram_blk, &freercvpool);
+                       return -1;
+               }
+       } else {
+               DEBUG("Out of memory in free receive command pool\n");
+               return -1;
+       }
+       return 0;
+}
+
 int ft1000_poll(void* dev_id)
 {
     struct ft1000_usb *dev = (struct ft1000_usb *)dev_id;
@@ -1492,8 +1540,7 @@ int ft1000_poll(void* dev_id)
     u16 data;
     u16 modulo;
     u16 portid;
-       struct dpram_blk *pdpram_blk;
-       struct pseudo_hdr *ppseudo_hdr;
+
     if (ft1000_chkcard(dev) == FALSE) {
         DEBUG("ft1000_poll::ft1000_chkcard: failed\n");
         return -1;
@@ -1529,45 +1576,8 @@ int ft1000_poll(void* dev_id)
                        status = dsp_broadcast_msg_id(dev);
                        break;
                     default:
-                        pdpram_blk = ft1000_get_buffer (&freercvpool);
-
-                        if (pdpram_blk != NULL) {
-                           if ( ft1000_receive_cmd(dev, pdpram_blk->pbuffer, MAX_CMD_SQSIZE) ) {
-                               ppseudo_hdr = (struct pseudo_hdr *)pdpram_blk->pbuffer;
-                               // Search for correct application block
-                               for (i=0; i<MAX_NUM_APP; i++) {
-                                   if (dev->app_info[i].app_id == ppseudo_hdr->portdest) {
-                                       break;
-                                   }
-                               }
-
-                               if (i == MAX_NUM_APP) {
-                                   DEBUG("FT1000:ft1000_parse_dpram_msg: No application matching id = %d\n", ppseudo_hdr->portdest);
-                                   // Put memory back to free pool
-                                   ft1000_free_buffer(pdpram_blk, &freercvpool);
-                               }
-                               else {
-                                   if (dev->app_info[i].NumOfMsg > MAX_MSG_LIMIT) {
-                                      // Put memory back to free pool
-                                      ft1000_free_buffer(pdpram_blk, &freercvpool);
-                                   }
-                                   else {
-                                       dev->app_info[i].nRxMsg++;
-                                       // Put message into the appropriate application block
-                                       list_add_tail(&pdpram_blk->list, &dev->app_info[i].app_sqlist);
-                                      dev->app_info[i].NumOfMsg++;
-                                   }
-                               }
-                           }
-                           else {
-                               // Put memory back to free pool
-                               ft1000_free_buffer(pdpram_blk, &freercvpool);
-                           }
-                        }
-                        else {
-                            DEBUG("Out of memory in free receive command pool\n");
-                        }
-                        break;
+                      status = handle_misc_portid(dev);
+                       break;
                 }
             }
             else {