RE: [PATCH v2] uas: fix super speed bMaxPacketSize0

[<fys@fysnet.net>]

I am okay with this patch.  Thank you.

Ben

> -----Original Message-----
> From: Gerd Hoffmann <kraxel@redhat.com>
> Sent: Friday, January 17, 2020 12:37 AM
> To: qemu-devel@nongnu.org
> Cc: fys@fysnet.net; Gerd Hoffmann <kraxel@redhat.com>
> Subject: [PATCH v2] uas: fix super speed bMaxPacketSize0
> 
> For usb2 bMaxPacketSize0 is "n", for usb3 it is "1 << n", so it must be 9 not 64
> ...
> 
> rom "Universal Serial Bus 3.1 Specification":
> 
>    If the device is operating at Gen X speed, the bMaxPacketSize0
>    field shall be set to 09H indicating a 512-byte maximum packet.
>    An Enhanced SuperSpeed device shall not support any other maximum
>    packet sizes for the default control pipe (endpoint 0) control
>    endpoint.
> 
> We now announce a 512-byte maximum packet.
> 
> Fixes: 89a453d4a5c ("uas-uas: usb3 streams")
> Reported-by: Benjamin David Lunt <fys@fysnet.net>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
>  hw/usb/dev-uas.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/usb/dev-uas.c b/hw/usb/dev-uas.c index
> 6d6d1073b907..1bc4dd4fafb8 100644
> --- a/hw/usb/dev-uas.c
> +++ b/hw/usb/dev-uas.c
> @@ -303,7 +303,7 @@ static const USBDescDevice desc_device_high = {
> 
>  static const USBDescDevice desc_device_super = {
>      .bcdUSB                        = 0x0300,
> -    .bMaxPacketSize0               = 64,
> +    .bMaxPacketSize0               = 9,
>      .bNumConfigurations            = 1,
>      .confs = (USBDescConfig[]) {
>          {
> --
> 2.18.1