Thank you, this patch fixes this issue.
Am 28.05.2013 16:23, schrieb Alan Stern:
On Mon, 27 May 2013, Oleksij Rempel wrote:
Hmmm. Maybe we can narrow this down. What happens if you apply only
parts of the commit?
For example, on top of c97041a, try applying only the hunks that change
ehci-sched.c. If that works, try applying also only the last hunk
affecting ehci-q.c. If that works, try applying also the two previous
hunks.
after ehci-sched.c hank i have this problem again:
+++ b/drivers/usb/host/ehci-sched.c
@@ -792,7 +792,6 @@ static int qh_schedule(struct ehci_hcd *ehci, struct
ehci_qh
unsigned frame; /* 0..(qh->period - 1), or
NO_FRAME */
struct ehci_qh_hw *hw = qh->hw;
- qh_refresh(ehci, qh);
hw->hw_next = EHCI_LIST_END(ehci);
frame = qh->start;
@@ -844,8 +843,6 @@ static int qh_schedule(struct ehci_hcd *ehci, struct
ehci_qh
} else
ehci_dbg (ehci, "reused qh %p schedule\n", qh);
- /* stuff into the periodic schedule */
- qh_link_periodic(ehci, qh);
done:
return status;
}
@@ -891,6 +888,12 @@ static int intr_submit (
qh = qh_append_tds(ehci, urb, qtd_list, epnum, &urb->ep->hcpriv);
BUG_ON (qh == NULL);
+ /* stuff into the periodic schedule */
+ if (qh->qh_state == QH_STATE_IDLE) {
+ qh_refresh(ehci, qh);
+ qh_link_periodic(ehci, qh);
+ }
+
/* ... update usbfs periodic stats */
ehci_to_hcd(ehci)->self.bandwidth_int_reqs++;
Good grief, I can't believe I forgot to include this material in the
original commit. I really am getting careless...
Anyway, this should fix the problem.
Alan Stern
Index: usb-3.9/drivers/usb/host/ehci-sched.c
===================================================================
--- usb-3.9.orig/drivers/usb/host/ehci-sched.c
+++ usb-3.9/drivers/usb/host/ehci-sched.c
@@ -646,6 +646,10 @@ static void end_unlink_intr(struct ehci_
/* reschedule QH iff another request is queued */
if (!list_empty(&qh->qtd_list) && ehci->rh_state == EHCI_RH_RUNNING) {
rc = qh_schedule(ehci, qh);
+ if (rc == 0) {
+ qh_refresh(ehci, qh);
+ qh_link_periodic(ehci, qh);
+ }
/* An error here likely indicates handshake failure
* or no space left in the schedule. Neither fault
@@ -653,9 +657,10 @@ static void end_unlink_intr(struct ehci_
*
* FIXME kill the now-dysfunctional queued urbs
*/
- if (rc != 0)
+ else {
ehci_err(ehci, "can't reschedule qh %p, err %d\n",
qh, rc);
+ }
}
/* maybe turn off periodic schedule */
--
Regards,
Oleksij
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