Hi,
in hub.c sleep_on is used. Thus there's a window during which an event that
should be processed could be queued instead. The included patch should fix it.
Regards
Oliver
--- hub.c.alt Fri Feb 1 16:41:16 2002
+++ hub.c Fri Feb 1 16:49:17 2002
@@ -878,6 +878,9 @@
static int usb_hub_thread(void *__hub)
{
+ DECLARE_WAITQUEUE(wait, current);
+ int pending = 0;
+ long flags;
lock_kernel();
/*
@@ -891,10 +894,18 @@
strcpy(current->comm, "khubd");
/* Send me a signal to get me die (for debugging) */
+ add_wait_queue(&khubd_wait, &wait);
do {
usb_hub_events();
- interruptible_sleep_on(&khubd_wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_lock_irqsave(&hub_event_lock, flags);
+ pending = !list_empty(&hub_event_list);
+ spin_unlock_irqrestore(&hub_event_lock, flags);
+ if (!pending)
+ schedule();
} while (!signal_pending(current));
+ remove_wait_queue(&khubd_wait, &wait);
+ set_current_state(TASK_RUNNING);
dbg("usb_hub_thread exiting");
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