[Libusb-devel] [PATCH] FreeBSD fix for usb_control_msg()

[Rene Ladan]

Konrad.Jankowski at master.ether.net schreef:
> I don't know how Net- or Open- handle this, but
> FreeBSD returns the number of transmited bytes in
> req.ucr_actlen, not in req.ucr_request.wLength.
> (/usr/include/dev/usb/usb.h:544:
>         int     ucr_actlen;             /* actual length transferred */
> 
> So then:
> --- bsd.c       Sat Mar  4 03:52:46 2006
> +++ ../../bsd.c Thu Aug  3 19:19:15 2006
> @@ -476,8 +476,11 @@
>    if (ret < 0)
>      USB_ERROR_STR(-errno, "error sending control message: %s",
>                    strerror(errno));
> -
> +#ifdef __FreeBSD_kernel__
> +  return req.ucr_actlen;
> +#else
>    return UGETW(req.ucr_request.wLength);
> +#endif
>  }
>  
>  int usb_os_find_busses(struct usb_bus **busses)
>
This seems correct, wLength is a uWord defined in usb_device_request_t
(usb/usb.h:112).
usb_device_request_t is included in usb_ctl_request (usb/usb.h:542),
which is the structure in which ucr_actlen (int) is defined (usb/usb.h:546)

I am cc'ing freebsd-usb@ since  I'm not sure about this patch...

Regards,
Rene
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