Re: how can i make the skeleton read function blocking function?

Am Dienstag, 24. April 2007 11:46 schrieb Wael Adel:
>         retval = usb_submit_urb(urb, GFP_KERNEL);
>         if (retval) {
>                 err("%s - failed submitting write urb, error %d", __FUNCTION__, retval);
>                 goto error;
>         }
> 
>         if (buf != NULL)
>         {
>                 if (copy_to_user(user_buffer, buf , readsize))
>                 {
>                         retval = -EFAULT;
>                         goto error;
>                 }
>         }

You are copying the the buffer to user space without waiting for the
URB to be executed. That cannot work.

	Regards
		Oliver
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