Alan Stern wrote:
> Okay, here's a patch for you to try. It refreshes the toggle setting
> in a linked but otherwise idle QH when a new URB is queued.
>
> Alan Stern
>
>
> Index: usb-2.6/drivers/usb/host/ehci-q.c
> ===================================================================
> --- usb-2.6.orig/drivers/usb/host/ehci-q.c
> +++ usb-2.6/drivers/usb/host/ehci-q.c
> @@ -88,7 +88,7 @@ static inline void
> qh_update (struct ehci_hcd *ehci, struct ehci_qh *qh, struct ehci_qtd *qtd)
> {
> /* writes to an active overlay are unsafe */
> - BUG_ON(qh->qh_state != QH_STATE_IDLE);
> + BUG_ON(qh->qh_state != QH_STATE_IDLE && !list_empty(&qh->qtd_list));
>
> qh->hw_qtd_next = QTD_NEXT(ehci, qtd->qtd_dma);
> qh->hw_alt_next = EHCI_LIST_END(ehci);
> @@ -971,7 +971,13 @@ static struct ehci_qh *qh_append_tds (
> /* can't sleep here, we have ehci->lock... */
> qh = qh_make (ehci, urb, GFP_ATOMIC);
> *ptr = qh;
> + } else if (list_empty(&qh->qtd_list)) {
> + /* There might have been a Clear-Halt while the QH
> + * was linked but empty.
> + */
> + qh_refresh(ehci, qh);
> }
> +
> if (likely (qh != NULL)) {
> struct ehci_qtd *qtd;
>
>
>
No luck I'm afraid (although there now appear to be 2 timeouts, not
one). I'm going to follow up on the laptop and get a USB log.
[ 118.017016] usb 1-10: new high speed USB device using ehci_hcd and
address 5
[ 118.148589] usb 1-10: configuration #1 chosen from 1 choice
[ 118.452964] dvb-usb: found a 'Technotrend TT-connect S-2400' in cold
state, will try to load a firmware
[ 118.452972] usb 1-10: firmware: requesting dvb-usb-tt-s2400-01.fw
[ 118.488474] dvb-usb: downloading firmware from file
'dvb-usb-tt-s2400-01.fw'
[ 118.550946] usbcore: registered new interface driver dvb_usb_ttusb2
[ 118.552553] usb 1-10: USB disconnect, address 5
[ 118.561083] dvb-usb: generic DVB-USB module successfully
deinitialized and disconnected.
[ 120.313020] usb 1-10: new high speed USB device using ehci_hcd and
address 6
[ 120.444942] usb 1-10: configuration #1 chosen from 1 choice
[ 120.445886] dvb-usb: found a 'Technotrend TT-connect S-2400' in warm
state.
[ 120.446672] dvb-usb: will pass the complete MPEG2 transport stream to
the software demuxer.
[ 120.447014] DVB: registering new adapter (Technotrend TT-connect S-2400)
[ 120.455026] DVB: registering adapter 0 frontend 129197120 (Philips
TDA10086 DVB-S)...
[ 120.458383] LNBx2x attached on addr=8<3>dvb-usb: recv bulk message
failed: -110
[ 122.457126] ttusb2: there might have been an error during control
message transfer. (rlen = 0, was 0)
[ 124.456109] dvb-usb: recv bulk message failed: -110
[ 124.456117] ttusb2: there might have been an error during control
message transfer. (rlen = 0, was 0)
[ 124.456122] dvb-usb: Technotrend TT-connect S-2400 successfully
initialized and connected.
David
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