Re: [patch] Real-Time Preemption, -RT-2.6.13-rc6-V0.7.53-11

[Ingo Molnar <mingo@elte.hu>]

* Alan Stern <stern@rowland.harvard.edu> wrote:

> P.S.: Another routine worth examining is async_completed() in 
> drivers/usb/core/devio.c.

i've added the patch below to be on the safe side.

	Ingo

Index: linux/drivers/usb/core/devio.c
===================================================================
--- linux.orig/drivers/usb/core/devio.c
+++ linux/drivers/usb/core/devio.c
@@ -274,10 +274,11 @@ static void async_completed(struct urb *
         struct async *as = (struct async *)urb->context;
         struct dev_state *ps = as->ps;
 	struct siginfo sinfo;
+	unsigned long flags;
 
-        spin_lock(&ps->lock);
-        list_move_tail(&as->asynclist, &ps->async_completed);
-        spin_unlock(&ps->lock);
+	spin_lock_irqsave(&ps->lock, flags);
+	list_move_tail(&as->asynclist, &ps->async_completed);
+	spin_unlock_irqrestore(&ps->lock, flags);
 	if (as->signr) {
 		sinfo.si_signo = as->signr;
 		sinfo.si_errno = as->urb->status;