fix(hcd) hcd_edpt_open() return true if endpoint is already opened.

src/host/hcd.h

@@ -163,6 +163,7 @@ void hcd_device_close(uint8_t rhport, uint8_t dev_addr);
 //--------------------------------------------------------------------+
 
 // Open an endpoint
+// return true if successfully opened or endpoint is currently opened
 bool hcd_edpt_open(uint8_t rhport, uint8_t daddr, tusb_desc_endpoint_t const * ep_desc);
 
 // Close an endpoint

src/portable/analog/max3421/hcd_max3421.c

@@ -611,7 +611,7 @@ bool hcd_edpt_open(uint8_t rhport, uint8_t daddr, tusb_desc_endpoint_t const * e
     ep = &_hcd_data.ep[0];
   }else {
     if (NULL != find_ep_not_addr0(daddr, ep_num, ep_dir)) {
-      return false; // endpoint already opened
+      return true; // already opened
     }
     ep = allocate_ep();
     TU_ASSERT(ep);

src/portable/ehci/ehci.c

@@ -381,7 +381,9 @@ bool hcd_edpt_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_endpoint_t const
   if (ep_desc->bEndpointAddress == 0) {
     p_qhd = qhd_control(dev_addr);
   } else {
-    TU_VERIFY(NULL == qhd_get_from_addr(dev_addr, ep_desc->bEndpointAddress)); // ep not opened yet
+    if (NULL != qhd_get_from_addr(dev_addr, ep_desc->bEndpointAddress)) {
+      return true; // already opened
+    }
     p_qhd = qhd_find_free();
   }
   TU_ASSERT(p_qhd);