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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