1 files changed, 21 insertions, 16 deletions

diff --git a/usb-linux.c b/usb-linux.c
index e08948567a..e990d3a87f 100644
--- a/usb-linux.c
+++ b/usb-linux.c
@@ -1056,10 +1056,9 @@ static int usb_linux_update_endp_table(USBHostDevice *s)
 }
 
 static int usb_host_open(USBHostDevice *dev, int bus_num,
-                         int addr, char *port, const char *prod_name)
+                        int addr, char *port, const char *prod_name, int speed)
 {
     int fd = -1, ret;
-    struct usbdevfs_connectinfo ci;
     char buf[1024];
 
     if (dev->fd != -1) {
@@ -1114,24 +1113,29 @@ static int usb_host_open(USBHostDevice *dev, int bus_num,
         goto fail;
     }
 
-    ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
-    if (ret < 0) {
-        perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
-        goto fail;
-    }
-
-    printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
-
     ret = usb_linux_update_endp_table(dev);
     if (ret) {
         goto fail;
     }
 
-    if (ci.slow) {
-        dev->dev.speed = USB_SPEED_LOW;
-    } else {
-        dev->dev.speed = USB_SPEED_HIGH;
+    if (speed == -1) {
+        struct usbdevfs_connectinfo ci;
+
+        ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
+        if (ret < 0) {
+            perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
+            goto fail;
+        }
+
+        if (ci.slow) {
+            speed = USB_SPEED_LOW;
+        } else {
+            speed = USB_SPEED_HIGH;
+        }
     }
+    dev->dev.speed = speed;
+
+    printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
 
     if (!prod_name || prod_name[0] == '\0') {
         snprintf(dev->dev.product_desc, sizeof(dev->dev.product_desc),
@@ -1345,7 +1349,8 @@ static int usb_host_scan_dev(void *opaque, USBScanFunc *func)
     }
 
     device_count = 0;
-    bus_num = addr = speed = class_id = product_id = vendor_id = 0;
+    bus_num = addr = class_id = product_id = vendor_id = 0;
+    speed = -1; /* Can't get the speed from /[proc|dev]/bus/usb/devices */
     for(;;) {
         if (fgets(line, sizeof(line), f) == NULL) {
             break;
@@ -1655,7 +1660,7 @@ static int usb_host_auto_scan(void *opaque, int bus_num, int addr, char *port,
         }
         DPRINTF("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
 
-        usb_host_open(s, bus_num, addr, port, product_name);
+        usb_host_open(s, bus_num, addr, port, product_name, speed);
     }
 
     return 0;