On Tue, Nov 20, 2018 at 09:18:15AM +0800, linzhecheng wrote:
> 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) {
Can't we just add detached = true here?
> continue;
> }
cheers,
Gerd
