@@ -137,6 +137,7 @@ static QTAILQ_HEAD(, USBHostDevice) hostdevs =
static void usb_host_auto_check(void *unused);
static void usb_host_release_interfaces(USBHostDevice *s);
static void usb_host_nodev(USBHostDevice *s);
+static void usb_host_detach_kernel(USBHostDevice *s);
static void usb_host_attach_kernel(USBHostDevice *s);
/* ------------------------------------------------------------------------ */
@@ -799,10 +800,13 @@ static int usb_host_open(USBHostDevice *s, libusb_device *dev)
goto fail;
}
- libusb_get_device_descriptor(dev, &s->ddesc);
s->dev = dev;
s->bus_num = bus_num;
s->addr = addr;
+
+ usb_host_detach_kernel(s);
+
+ libusb_get_device_descriptor(dev, &s->ddesc);
usb_host_get_port(s->dev, s->port, sizeof(s->port));
usb_ep_init(udev);
@@ -1063,7 +1067,6 @@ static void usb_host_set_config(USBHostDevice *s, int config, USBPacket *p)
trace_usb_host_set_config(s->bus_num, s->addr, config);
usb_host_release_interfaces(s);
- usb_host_detach_kernel(s);
rc = libusb_set_configuration(s->dh, config);
if (rc != 0) {
usb_host_libusb_error("libusb_set_configuration", rc);
If we detach the kernel drivers on the first set_config, then they will be still attached when the device gets its initial reset. Causing the drivers to re-initialize the device after the reset, dirtying the device state. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- hw/usb/host-libusb.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)