diff --git a/class/audio/usbh_audio.c b/class/audio/usbh_audio.c
index 6e7d94e8..4c1729fd 100644
--- a/class/audio/usbh_audio.c
+++ b/class/audio/usbh_audio.c
@@ -222,7 +222,7 @@ int usbh_audio_set_mute(struct usbh_audio *audio_class, const char *name, uint8_
 
     memcpy(g_audio_buf, &mute, 1);
     ret = usbh_control_transfer(audio_class->hport->ep0, setup, g_audio_buf);
-    
+
     return ret;
 }
 
@@ -422,12 +422,13 @@ static int usbh_audio_ctrl_disconnect(struct usbh_hubport *hport, uint8_t intf)
             usbh_pipe_free(audio_class->isoout);
         }
 
-        usbh_audio_stop(audio_class);
+        if (hport->config.intf[intf].devname[0] != '\0') {
+            USB_LOG_INFO("Unregister Audio Class:%s\r\n", hport->config.intf[intf].devname);
+            usbh_audio_stop(audio_class);
+        }
+
         memset(audio_class, 0, sizeof(struct usbh_audio));
         usb_free(audio_class);
-
-        if (hport->config.intf[intf].devname[0] != '\0')
-            USB_LOG_INFO("Unregister Audio Class:%s\r\n", hport->config.intf[intf].devname);
     }
 
     return ret;
diff --git a/class/cdc/usbh_cdc_acm.c b/class/cdc/usbh_cdc_acm.c
index bf1babb8..3fc90713 100644
--- a/class/cdc/usbh_cdc_acm.c
+++ b/class/cdc/usbh_cdc_acm.c
@@ -124,13 +124,7 @@ static int usbh_cdc_acm_connect(struct usbh_hubport *hport, uint8_t intf)
 
 #ifdef CONFIG_USBHOST_CDC_ACM_NOTIFY
     ep_desc = &hport->config.intf[intf].altsetting[0].ep[0].ep_desc;
-    ep_cfg.ep_addr = ep_desc->bEndpointAddress;
-    ep_cfg.ep_type = ep_desc->bmAttributes & USB_ENDPOINT_TYPE_MASK;
-    ep_cfg.ep_mps = ep_desc->wMaxPacketSize;
-    ep_cfg.ep_interval = ep_desc->bInterval;
-    ep_cfg.hport = hport;
-    usbh_pipe_alloc(&cdc_acm_class->intin, &ep_cfg);
-
+    usbh_hport_activate_epx(&cdc_acm_class->intin, hport, ep_desc);
 #endif
     for (uint8_t i = 0; i < hport->config.intf[intf + 1].altsetting[0].intf_desc.bNumEndpoints; i++) {
         ep_desc = &hport->config.intf[intf + 1].altsetting[0].ep[i].ep_desc;
@@ -167,12 +161,13 @@ static int usbh_cdc_acm_disconnect(struct usbh_hubport *hport, uint8_t intf)
             usbh_pipe_free(cdc_acm_class->bulkout);
         }
 
-        usbh_cdc_acm_stop(cdc_acm_class);
+        if (hport->config.intf[intf].devname[0] != '\0') {
+            USB_LOG_INFO("Unregister CDC ACM Class:%s\r\n", hport->config.intf[intf].devname);
+            usbh_cdc_acm_stop(cdc_acm_class);
+        }
+
         memset(cdc_acm_class, 0, sizeof(struct usbh_cdc_acm));
         usb_free(cdc_acm_class);
-
-        if (hport->config.intf[intf].devname[0] != '\0')
-            USB_LOG_INFO("Unregister CDC ACM Class:%s\r\n", hport->config.intf[intf].devname);
     }
 
     return ret;
@@ -190,12 +185,10 @@ static int usbh_cdc_data_disconnect(struct usbh_hubport *hport, uint8_t intf)
 
 __WEAK void usbh_cdc_acm_run(struct usbh_cdc_acm *cdc_acm_class)
 {
-
 }
 
 __WEAK void usbh_cdc_acm_stop(struct usbh_cdc_acm *cdc_acm_class)
 {
-
 }
 
 const struct usbh_class_driver cdc_acm_class_driver = {
diff --git a/class/hid/usbh_hid.c b/class/hid/usbh_hid.c
index 23ee2a05..9dbc266e 100644
--- a/class/hid/usbh_hid.c
+++ b/class/hid/usbh_hid.c
@@ -169,12 +169,13 @@ int usbh_hid_disconnect(struct usbh_hubport *hport, uint8_t intf)
             usbh_pipe_free(hid_class->intout);
         }
 
-        usbh_hid_stop(hid_class);
+        if (hport->config.intf[intf].devname[0] != '\0') {
+            USB_LOG_INFO("Unregister HID Class:%s\r\n", hport->config.intf[intf].devname);
+            usbh_hid_stop(hid_class);
+        }
+
         memset(hid_class, 0, sizeof(struct usbh_hid));
         usb_free(hid_class);
-
-        if (hport->config.intf[intf].devname[0] != '\0')
-            USB_LOG_INFO("Unregister HID Class:%s\r\n", hport->config.intf[intf].devname);
     }
 
     return ret;
@@ -182,12 +183,10 @@ int usbh_hid_disconnect(struct usbh_hubport *hport, uint8_t intf)
 
 __WEAK void usbh_hid_run(struct usbh_hid *hid_class)
 {
-
 }
 
 __WEAK void usbh_hid_stop(struct usbh_hid *hid_class)
 {
-
 }
 
 const struct usbh_class_driver hid_class_driver = {
diff --git a/class/msc/usbh_msc.c b/class/msc/usbh_msc.c
index 70e64e4e..a36ba880 100644
--- a/class/msc/usbh_msc.c
+++ b/class/msc/usbh_msc.c
@@ -66,9 +66,9 @@ static void usbh_msc_cbw_dump(struct CBW *cbw)
     USB_LOG_DBG("CB:\r\n");
     for (i = 0; i < cbw->bCBLength; i += 8) {
         USB_LOG_DBG("  0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\r\n",
-                     cbw->CB[i], cbw->CB[i + 1], cbw->CB[i + 2],
-                     cbw->CB[i + 3], cbw->CB[i + 4], cbw->CB[i + 5],
-                     cbw->CB[i + 6], cbw->CB[i + 7]);
+                    cbw->CB[i], cbw->CB[i + 1], cbw->CB[i + 2],
+                    cbw->CB[i + 3], cbw->CB[i + 4], cbw->CB[i + 5],
+                    cbw->CB[i + 6], cbw->CB[i + 7]);
     }
 }
 
@@ -359,12 +359,13 @@ static int usbh_msc_disconnect(struct usbh_hubport *hport, uint8_t intf)
             usbh_pipe_free(msc_class->bulkout);
         }
 
-        usbh_msc_stop(msc_class);
+        if (hport->config.intf[intf].devname[0] != '\0') {
+            USB_LOG_INFO("Unregister MSC Class:%s\r\n", hport->config.intf[intf].devname);
+            usbh_msc_stop(msc_class);
+        }
+
         memset(msc_class, 0, sizeof(struct usbh_msc));
         usb_free(msc_class);
-
-        if (hport->config.intf[intf].devname[0] != '\0')
-            USB_LOG_INFO("Unregister MSC Class:%s\r\n", hport->config.intf[intf].devname);
     }
 
     return ret;
diff --git a/class/mtp/usbh_mtp.c b/class/mtp/usbh_mtp.c
index 98c02a8b..2c9bbbf5 100644
--- a/class/mtp/usbh_mtp.c
+++ b/class/mtp/usbh_mtp.c
@@ -21,37 +21,22 @@ static int usbh_mtp_connect(struct usbh_hubport *hport, uint8_t intf)
     }
 
     memset(mtp_class, 0, sizeof(struct usbh_mtp));
-
     mtp_class->hport = hport;
-    mtp_class->ctrl_intf = intf;
-    mtp_class->data_intf = intf + 1;
+    mtp_class->intf = intf;
 
     hport->config.intf[intf].priv = mtp_class;
-    hport->config.intf[intf + 1].priv = NULL;
-    strncpy(hport->config.intf[intf].devname, DEV_FORMAT, CONFIG_USBHOST_DEV_NAMELEN);
 
 #ifdef CONFIG_USBHOST_MTP_NOTIFY
-    ep_desc = &hport->config.intf[intf].ep[0].ep_desc;
-    ep_cfg.ep_addr = ep_desc->bEndpointAddress;
-    ep_cfg.ep_type = ep_desc->bmAttributes & USB_ENDPOINT_TYPE_MASK;
-    ep_cfg.ep_mps = ep_desc->wMaxPacketSize;
-    ep_cfg.ep_interval = ep_desc->bInterval;
-    ep_cfg.hport = hport;
-    usbh_pipe_alloc(&mtp_class->intin, &ep_cfg);
-
+    ep_desc = &hport->config.intf[intf].altsetting[0].ep[0].ep_desc;
+    usbh_hport_activate_epx(&mtp_class->intin, hport, ep_desc);
 #endif
-    for (uint8_t i = 0; i < hport->config.intf[intf + 1].intf_desc.bNumEndpoints; i++) {
-        ep_desc = &hport->config.intf[intf + 1].ep[i].ep_desc;
+    for (uint8_t i = 0; i < hport->config.intf[intf + 1].altsetting[0].intf_desc.bNumEndpoints; i++) {
+        ep_desc = &hport->config.intf[intf + 1].altsetting[0].ep[i].ep_desc;
 
-        ep_cfg.ep_addr = ep_desc->bEndpointAddress;
-        ep_cfg.ep_type = ep_desc->bmAttributes & USB_ENDPOINT_TYPE_MASK;
-        ep_cfg.ep_mps = ep_desc->wMaxPacketSize & USB_MAXPACKETSIZE_MASK;;
-        ep_cfg.ep_interval = ep_desc->bInterval;
-        ep_cfg.hport = hport;
         if (ep_desc->bEndpointAddress & 0x80) {
-            usbh_pipe_alloc(&mtp_class->bulkin, &ep_cfg);
+            usbh_hport_activate_epx(&mtp_class->bulkin, hport, ep_desc);
         } else {
-            usbh_pipe_alloc(&mtp_class->bulkout, &ep_cfg);
+            usbh_hport_activate_epx(&mtp_class->bulkout, hport, ep_desc);
         }
     }
 
@@ -77,14 +62,12 @@ static int usbh_mtp_disconnect(struct usbh_hubport *hport, uint8_t intf)
             usbh_pipe_free(mtp_class->bulkout);
         }
 
-        usb_free(mtp_class);
-
-        if (hport->config.intf[intf].devname[0] != '\0')
+        if (hport->config.intf[intf].devname[0] != '\0') {
             USB_LOG_INFO("Unregister MTP Class:%s\r\n", hport->config.intf[intf].devname);
+        }
 
-        memset(hport->config.intf[intf].devname, 0, CONFIG_USBHOST_DEV_NAMELEN);
-        hport->config.intf[intf].priv = NULL;
-        hport->config.intf[intf + 1].priv = NULL;
+        memset(mtp_class, 0, sizeof(struct usbh_mtp));
+        usb_free(mtp_class);
     }
 
     return ret;
diff --git a/class/printer/usbh_printer.c b/class/printer/usbh_printer.c
index 6b55b068..8423b353 100644
--- a/class/printer/usbh_printer.c
+++ b/class/printer/usbh_printer.c
@@ -69,18 +69,13 @@ static int usbh_printer_connect(struct usbh_hubport *hport, uint8_t intf)
 
     hport->config.intf[intf].priv = printer_class;
 
-    for (uint8_t i = 0; i < hport->config.intf[intf + 1].intf_desc.bNumEndpoints; i++) {
-        ep_desc = &hport->config.intf[intf + 1].ep[i].ep_desc;
+    for (uint8_t i = 0; i < hport->config.intf[intf + 1].altsetting[0].intf_desc.bNumEndpoints; i++) {
+        ep_desc = &hport->config.intf[intf + 1].altsetting[0].ep[i].ep_desc;
 
-        ep_cfg.ep_addr = ep_desc->bEndpointAddress;
-        ep_cfg.ep_type = ep_desc->bmAttributes & USB_ENDPOINT_TYPE_MASK;
-        ep_cfg.ep_mps = ep_desc->wMaxPacketSize & USB_MAXPACKETSIZE_MASK;
-        ep_cfg.ep_interval = ep_desc->bInterval;
-        ep_cfg.hport = hport;
         if (ep_desc->bEndpointAddress & 0x80) {
-            usbh_pipe_alloc(&printer_class->bulkin, &ep_cfg);
+            usbh_hport_activate_epx(&printer_class->bulkin, hport, ep_desc);
         } else {
-            usbh_pipe_alloc(&printer_class->bulkout, &ep_cfg);
+            usbh_hport_activate_epx(&printer_class->bulkout, hport, ep_desc);
         }
     }
 
@@ -90,7 +85,7 @@ static int usbh_printer_connect(struct usbh_hubport *hport, uint8_t intf)
 
     USB_LOG_INFO("Register Printer Class:%s\r\n", hport->config.intf[intf].devname);
 
-    return ret;
+    return 0;
 }
 
 static int usbh_printer_disconnect(struct usbh_hubport *hport, uint8_t intf)
@@ -108,13 +103,12 @@ static int usbh_printer_disconnect(struct usbh_hubport *hport, uint8_t intf)
             usbh_pipe_free(printer_class->bulkout);
         }
 
-        usb_free(printer_class);
-
-        if (hport->config.intf[intf].devname[0] != '\0')
+        if (hport->config.intf[intf].devname[0] != '\0') {
             USB_LOG_INFO("Unregister Printer Class:%s\r\n", hport->config.intf[intf].devname);
+        }
 
-        memset(hport->config.intf[intf].devname, 0, CONFIG_USBHOST_DEV_NAMELEN);
-        hport->config.intf[intf].priv = NULL;
+        memset(printer_class, 0, sizeof(struct usbh_printer));
+        usb_free(printer_class);
     }
 
     return ret;
diff --git a/class/video/usbh_video.c b/class/video/usbh_video.c
index c123b120..372b748d 100644
--- a/class/video/usbh_video.c
+++ b/class/video/usbh_video.c
@@ -411,12 +411,13 @@ static int usbh_video_ctrl_disconnect(struct usbh_hubport *hport, uint8_t intf)
             usbh_pipe_free(video_class->isoout);
         }
 
-        usbh_video_stop(video_class);
+        if (hport->config.intf[intf].devname[0] != '\0') {
+            USB_LOG_INFO("Unregister Video Class:%s\r\n", hport->config.intf[intf].devname);
+            usbh_video_stop(video_class);
+        }
+
         memset(video_class, 0, sizeof(struct usbh_video));
         usb_free(video_class);
-
-        if (hport->config.intf[intf].devname[0] != '\0')
-            USB_LOG_INFO("Unregister Video Class:%s\r\n", hport->config.intf[intf].devname);
     }
 
     return ret;
diff --git a/class/wireless/usbh_rndis.c b/class/wireless/usbh_rndis.c
index 49feb491..75b8fa16 100644
--- a/class/wireless/usbh_rndis.c
+++ b/class/wireless/usbh_rndis.c
@@ -395,12 +395,13 @@ static int usbh_rndis_disconnect(struct usbh_hubport *hport, uint8_t intf)
             usbh_pipe_free(rndis_class->bulkout);
         }
 
-        usbh_rndis_stop(rndis_class);
+        if (hport->config.intf[intf].devname[0] != '\0') {
+            USB_LOG_INFO("Unregister RNDIS Class:%s\r\n", hport->config.intf[intf].devname);
+            usbh_rndis_stop(rndis_class);
+        }
+
         memset(rndis_class, 0, sizeof(struct usbh_rndis));
         usb_free(rndis_class);
-
-        if (hport->config.intf[intf].devname[0] != '\0')
-            USB_LOG_INFO("Unregister RNDIS Class:%s\r\n", hport->config.intf[intf].devname);
     }
 
     return ret;