diff --git a/hw/usb-desc.c b/hw/usb-desc.c
index 0768334b8c..b3eb97bc6b 100644
--- a/hw/usb-desc.c
+++ b/hw/usb-desc.c
@@ -248,6 +248,8 @@ static void usb_desc_ep_init(USBDevice *dev)
             ep = iface->eps[e].bEndpointAddress & 0x0f;
             usb_ep_set_type(dev, pid, ep, iface->eps[e].bmAttributes & 0x03);
             usb_ep_set_ifnum(dev, pid, ep, iface->bInterfaceNumber);
+            usb_ep_set_max_packet_size(dev, pid, ep,
+                                       iface->eps[e].wMaxPacketSize);
         }
     }
 }
diff --git a/hw/usb.c b/hw/usb.c
index f07cb9d58c..0f163b45ff 100644
--- a/hw/usb.c
+++ b/hw/usb.c
@@ -449,8 +449,9 @@ void usb_ep_dump(USBDevice *dev)
                     fprintf(stderr, "  Interface %d, alternative %d\n",
                             ifnum, dev->altsetting[ifnum]);
                 }
-                fprintf(stderr, "    Endpoint %d, IN, %s\n", ep,
-                        tname[dev->ep_in[ep].type]);
+                fprintf(stderr, "    Endpoint %d, IN, %s, %d max\n", ep,
+                        tname[dev->ep_in[ep].type],
+                        dev->ep_in[ep].max_packet_size);
             }
             if (dev->ep_out[ep].type != USB_ENDPOINT_XFER_INVALID &&
                 dev->ep_out[ep].ifnum == ifnum) {
@@ -459,8 +460,9 @@ void usb_ep_dump(USBDevice *dev)
                     fprintf(stderr, "  Interface %d, alternative %d\n",
                             ifnum, dev->altsetting[ifnum]);
                 }
-                fprintf(stderr, "    Endpoint %d, OUT, %s\n", ep,
-                        tname[dev->ep_out[ep].type]);
+                fprintf(stderr, "    Endpoint %d, OUT, %s, %d max\n", ep,
+                        tname[dev->ep_out[ep].type],
+                        dev->ep_out[ep].max_packet_size);
             }
         }
     }
@@ -498,3 +500,30 @@ void usb_ep_set_ifnum(USBDevice *dev, int pid, int ep, uint8_t ifnum)
     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
     uep->ifnum = ifnum;
 }
+
+void usb_ep_set_max_packet_size(USBDevice *dev, int pid, int ep,
+                                uint16_t raw)
+{
+    struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
+    int size, microframes;
+
+    size = raw & 0x7ff;
+    switch ((raw >> 11) & 3) {
+    case 1:
+        microframes = 2;
+        break;
+    case 2:
+        microframes = 3;
+        break;
+    default:
+        microframes = 1;
+        break;
+    }
+    uep->max_packet_size = size * microframes;
+}
+
+int usb_ep_get_max_packet_size(USBDevice *dev, int pid, int ep)
+{
+    struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
+    return uep->max_packet_size;
+}
diff --git a/hw/usb.h b/hw/usb.h
index c35ff7437b..5ea984cfdd 100644
--- a/hw/usb.h
+++ b/hw/usb.h
@@ -176,6 +176,7 @@ struct USBDescString {
 struct USBEndpoint {
     uint8_t type;
     uint8_t ifnum;
+    int max_packet_size;
 };
 
 /* definition of a USB device */
@@ -339,6 +340,9 @@ uint8_t usb_ep_get_type(USBDevice *dev, int pid, int ep);
 uint8_t usb_ep_get_ifnum(USBDevice *dev, int pid, int ep);
 void usb_ep_set_type(USBDevice *dev, int pid, int ep, uint8_t type);
 void usb_ep_set_ifnum(USBDevice *dev, int pid, int ep, uint8_t ifnum);
+void usb_ep_set_max_packet_size(USBDevice *dev, int pid, int ep,
+                                uint16_t raw);
+int usb_ep_get_max_packet_size(USBDevice *dev, int pid, int ep);
 
 void usb_attach(USBPort *port);
 void usb_detach(USBPort *port);
diff --git a/usb-linux.c b/usb-linux.c
index 2a7b748ee6..56898dd4cd 100644
--- a/usb-linux.c
+++ b/usb-linux.c
@@ -83,7 +83,6 @@ struct endp_data {
     AsyncURB *iso_urb;
     int iso_urb_idx;
     int iso_buffer_used;
-    int max_packet_size;
     int inflight;
 };
 
@@ -259,26 +258,6 @@ static int get_iso_buffer_used(USBHostDevice *s, int pid, int ep)
     return get_endp(s, pid, ep)->iso_buffer_used;
 }
 
-static void set_max_packet_size(USBHostDevice *s, int pid, int ep,
-                                uint8_t *descriptor)
-{
-    int raw = descriptor[4] + (descriptor[5] << 8);
-    int size, microframes;
-
-    size = raw & 0x7ff;
-    switch ((raw >> 11) & 3) {
-    case 1:  microframes = 2; break;
-    case 2:  microframes = 3; break;
-    default: microframes = 1; break;
-    }
-    get_endp(s, pid, ep)->max_packet_size = size * microframes;
-}
-
-static int get_max_packet_size(USBHostDevice *s, int pid, int ep)
-{
-    return get_endp(s, pid, ep)->max_packet_size;
-}
-
 /*
  * Async URB state.
  * We always allocate iso packet descriptors even for bulk transfers
@@ -674,7 +653,7 @@ static void usb_host_handle_destroy(USBDevice *dev)
 static AsyncURB *usb_host_alloc_iso(USBHostDevice *s, int pid, uint8_t ep)
 {
     AsyncURB *aurb;
-    int i, j, len = get_max_packet_size(s, pid, ep);
+    int i, j, len = usb_ep_get_max_packet_size(&s->dev, pid, ep);
 
     aurb = g_malloc0(s->iso_urb_count * sizeof(*aurb));
     for (i = 0; i < s->iso_urb_count; i++) {
@@ -754,7 +733,7 @@ static int usb_host_handle_iso_data(USBHostDevice *s, USBPacket *p, int in)
     int i, j, ret, max_packet_size, offset, len = 0;
     uint8_t *buf;
 
-    max_packet_size = get_max_packet_size(s, p->pid, p->devep);
+    max_packet_size = usb_ep_get_max_packet_size(&s->dev, p->pid, p->devep);
     if (max_packet_size == 0)
         return USB_RET_NAK;
 
@@ -1133,6 +1112,7 @@ static int usb_linux_update_endp_table(USBHostDevice *s)
 {
     uint8_t *descriptors;
     uint8_t devep, type, alt_interface;
+    uint16_t raw;
     int interface, length, i, ep, pid;
     struct endp_data *epd;
 
@@ -1200,9 +1180,8 @@ static int usb_linux_update_endp_table(USBHostDevice *s)
             }
 
             type = descriptors[i + 3] & 0x3;
-            if (type == USB_ENDPOINT_XFER_ISOC) {
-                set_max_packet_size(s, pid, ep, descriptors + i);
-            };
+            raw = descriptors[i + 4] + (descriptors[i + 5] << 8);
+            usb_ep_set_max_packet_size(&s->dev, pid, ep, raw);
             assert(usb_ep_get_type(&s->dev, pid, ep) ==
                    USB_ENDPOINT_XFER_INVALID);
             usb_ep_set_type(&s->dev, pid, ep, type);