i expect that the bulk data read on the wire would be the same data in
"buf". i see different data on the wire than that returned by "buf" 50% of
the time.
isoc reads seem to be consistent. and both isoc/bulk writes are correct. i
only have one "buf". i've tried making "buf" a static pointer: static WORD
* buf; and when ever user wants to do transfers i have to read the "size"
they pass in and do a "kmalloc" for "buf". after each transaction "buf" is
freed. but definitely not until transaction is done.
i even have a print statement right after transaction completes (see below)
and it proves that "buf" is bad.
anyone have any ideas? snippet of my code is below.
thanks,
-charyll angderson
int usbx_submit_trans(struct usbxDevice *usbxPtr, struct usb_device *dev,
struct _Transaction *trans, WORD *buf)
{
int i,j,k;
usbx_show_trans(trans);
switch(trans->type) {
case USBX_R_BULK:
FILL_BULK_URB(usbxPtr->usbx_urb, dev, usb_rcvbulkpipe(dev,
trans->endpoint),
buf, trans->size, usbx_urb_complete, usbxPtr);
break;
default:
dbg("invaid trans type!");
break;
}
usbx_submit_urb(usbxPtr->usbx_urb);
interruptible_sleep_on_timeout(&(usbxPtr->wait), trans->timeout);
if (usbxPtr->usbx_urb->status!=0) {
err("TIMEOUT awoken %i (%s)
status=0x%x",current->pid,current->comm,usbxPtr->usbx_urb->status); //ca
debug
usbx_unlink_urb(usbxPtr->usbx_urb); // remove urb safely
}
switch (trans->type) {
case USBX_R_BULK:
dbg("usbx_submit_trans: print buffer read ..
address=0x%lx", (DWORD)&buf);
for (i=0; i<(trans->size/2); i++) {
dbg(" %x ",(WORD)buf[i]);
}
break;
default:
break;
}
return usbxPtr->usbx_urb->status;
}
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