Here's a patch that tweaks a different area of the code. Makes a difference for me; maybe for you too?
- Dave
--- 1.70/drivers/usb/host/ehci-q.c Mon Feb 24 03:30:38 2003
+++ edited/drivers/usb/host/ehci-q.c Sun Mar 2 23:25:09 2003
@@ -712,6 +712,11 @@
if (!(cmd & CMD_ASE)) {
/* in case a clear of CMD_ASE didn't take yet */
(void) handshake (&ehci->regs->status, STS_ASS, 0, 150);
+
+ /* force async head to be valid */
+ writel ((u32)ehci->async->qh_dma,
+ &ehci->regs->async_next);
+
cmd |= CMD_ASE | CMD_RUN;
writel (cmd, &ehci->regs->command);
ehci->hcd.state = USB_STATE_RUNNING;
@@ -916,7 +921,7 @@
del_timer (&ehci->watchdog);
- qh->hw_next = cpu_to_le32 (qh->qh_dma);
+ // qh->hw_next = cpu_to_le32 (qh->qh_dma);
qh->qh_state = QH_STATE_IDLE;
qh->qh_next.qh = 0;
qh_put (ehci, qh); // refcount from reclaim
