On 9/2/20 2:16 PM, Sai Pavan Boddu wrote:
> Fixes compilation issue with older kernels, below is the error which is
> fixed.
> 
> hw/usb/host-libusb.c:954:32: error: ‘USBDEVFS_GET_SPEED’ undeclared
> (first use in this function)
>          int rc = ioctl(hostfd, USBDEVFS_GET_SPEED, NULL);
> 
> Signed-off-by: Sai Pavan Boddu <sai.pavan.bo...@xilinx.com>
> ---
>  hw/usb/host-libusb.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
> index 08604f7..c30d450 100644
> --- a/hw/usb/host-libusb.c
> +++ b/hw/usb/host-libusb.c
> @@ -942,7 +942,7 @@ static int usb_host_open(USBHostDevice *s, libusb_device 
> *dev, int hostfd)
>      usb_host_ep_update(s);
>  
>      libusb_speed = libusb_get_device_speed(dev);
> -#ifdef CONFIG_LINUX
> +#if defined(CONFIG_LINUX) && defined(USBDEVFS_GET_SPEED)

Gerd recently sent a slightly different patch:
https://lists.gnu.org/archive/html/qemu-devel/2020-09/msg00649.html

>      if (hostfd && libusb_speed == 0) {
>          /*
>           * Workaround libusb bug: libusb_get_device_speed() does not
> 


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