[Qemu-devel] [PATCH] 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..db4ae1e6e8 100644
--- a/hw/usb/host-libusb.c
+++ b/hw/usb/host-libusb.c
@@ -1119,6 +1119,10 @@ static void usb_host_detach_kernel(USBHostDevice *s)
     for (i = 0; i < USB_MAX_INTERFACES; i++) {
         rc = libusb_kernel_driver_active(s->dh, i);
         usb_host_libusb_error("libusb_kernel_driver_active", rc);
+        if (rc == 0) {
+            s->ifs[i].detached = true;
+            continue;
+        }
         if (rc != 1) {
             continue;
         }
-- 
2.12.2.windows.2