[Qemu-devel] Re: [PATCH] husb: Make control transactions asynchronous

[Anthony Liguori <anthony@codemonkey.ws>]

Max Krasnyansky wrote:
> USB is 99.8% async now :). 0.2% is the three control requests that
> we need to execute synchronously. We could off-load that to a thread
> or something but it's not worth the pain since those requests are
> performed only during device initialization (ie when device is
> connected to the VM).
>
> The change is a bit bigger than I wanted due to the fact that generic
> handle_packet()/handle_control() interface was not designed for
> async transactions. So I ended up adding custom handle_packet()
> code to usb-linux. We can make that generic if/when some other
> component needs it.
>
> Signed-off-by: Max Krasnyansky <maxk@kernel.org>
> ---
>  usb-linux.c |  461 +++++++++++++++++++++++++++++++++++++++++++++++------------
>  1 files changed, 369 insertions(+), 92 deletions(-)
>
> diff --git a/usb-linux.c b/usb-linux.c
> index c31d56a..3ac4440 100644
> --- a/usb-linux.c
> +++ b/usb-linux.c
> @@ -25,28 +25,21 @@
>   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
>   * THE SOFTWARE.
>   */
> +
>  #include "qemu-common.h"
>  #include "qemu-timer.h"
> -#include "hw/usb.h"
>   

hw/usb.h defines USBDevice.  By moving this include into the #if 
defined(__linux__) block, it breaks the win32 build.  I was able to fix 
it by moving it down to the #else clause.

> +static int ctrl_error()
>   

This needs to be static int ctrl_error(void).

This patch fuzzed really bad for me (for some odd reason).  Since I 
can't test this easily, I'd rather you update your patch with these 
changes, and resend after testing.

Regards,

Anthony Liguori