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

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 1/17/20 8:37 AM, Gerd Hoffmann wrote:
> 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":

Oops typo "From" ;) You can obviously fix that directly on your tree, no 
need for v3.

Thanks for the v2!

> 
>     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[]) {
>           {
>