diff -ur linux-2.4.30.dev/drivers/usb/host/ehci-q.c linux-tmp/drivers/usb/host/ehci-q.c
--- linux-2.4.30.dev/drivers/usb/host/ehci-q.c	2005-01-19 15:10:07.000000000 +0100
+++ linux-tmp/drivers/usb/host/ehci-q.c	2005-03-30 05:11:12.000000000 +0200
@@ -783,6 +765,11 @@
 		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;
