Hi, could you try the following patch ? It seems there is a flow in the error condition. Matthieu diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index 56a3203..464b451 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -1475,6 +1475,7 @@ iso_stream_schedule ( * jump until after the queue is primed. */ else { + int done = 0; start = SCHEDULE_SLOP + (now & ~0x07); /* NOTE: assumes URB_ISO_ASAP, to limit complexity/bugs */ @@ -1491,19 +1492,23 @@ iso_stream_schedule ( /* check schedule: enough space? */ if (stream->highspeed) { if (itd_slot_ok(ehci, mod, start, - stream->usecs, period)) + stream->usecs, period)) { + done = 1; break; + } } else { if ((start % 8) >= 6) continue; if (sitd_slot_ok(ehci, mod, stream, - start, sched, period)) + start, sched, period)) { + done = 1; break; + } } } while (start > next); /* no room in the schedule */ - if (start == next) { + if (!done) { ehci_dbg(ehci, "iso resched full %p (now %d max %d)\n", urb, now, now + mod); status = -ENOSPC; -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html