staging: rtl8712: r8712_xmit_resource_alloc(): Change return values

Change call site of function r8712_xmit_resource_alloc to add a check
for its return value.
Change return values of r8712_xmit_resource_alloc from
_SUCCESS/_FAIL to 0/-ENOMEM.
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl871x_xmit.c

@@ -133,7 +133,8 @@ sint _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
 		pxmitbuf->pbuf = pxmitbuf->pallocated_buf + XMITBUF_ALIGN_SZ -
 				 ((addr_t) (pxmitbuf->pallocated_buf) &
 				 (XMITBUF_ALIGN_SZ - 1));
-		r8712_xmit_resource_alloc(padapter, pxmitbuf);
+		if (r8712_xmit_resource_alloc(padapter, pxmitbuf))
+			return _FAIL;
 		list_add_tail(&pxmitbuf->list,
 				 &(pxmitpriv->free_xmitbuf_queue.queue));
 		pxmitbuf++;

drivers/staging/rtl8712/xmit_linux.c

@@ -120,11 +120,11 @@ int r8712_xmit_resource_alloc(struct _adapter *padapter,
 		pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 		if (!pxmitbuf->pxmit_urb[i]) {
 			netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
-			return _FAIL;
+			return -ENOMEM;
 		}
 		kmemleak_not_leak(pxmitbuf->pxmit_urb[i]);
 	}
-	return _SUCCESS;
+	return 0;
 }
 
 void r8712_xmit_resource_free(struct _adapter *padapter,