[Qemu-devel] [PATCH v2] usb-host: set ifs.detached as true if kernel driver is not active

[linzhecheng]

If no kernel driver is active, we can already claim and perform I/O on
it without detaching it.

Signed-off-by: linzhecheng <linzhech...@huawei.com>

diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
index f31e9cbbb8..b6602ded4e 100644
--- a/hw/usb/host-libusb.c
+++ b/hw/usb/host-libusb.c
@@ -1120,6 +1120,9 @@ static void usb_host_detach_kernel(USBHostDevice *s)
         rc = libusb_kernel_driver_active(s->dh, i);
         usb_host_libusb_error("libusb_kernel_driver_active", rc);
         if (rc != 1) {
+            if (rc == 0) {
+                s->ifs[i].detached = true;
+            }
             continue;
         }
         trace_usb_host_detach_kernel(s->bus_num, s->addr, i);
-- 
2.12.2.windows.2