Re: [patch] Real-Time Preemption, -RT-2.6.12-rc6-V0.7.48-00

[Daniel Walker]

On Wed, 2005-06-08 at 13:28 +0200, Ingo Molnar wrote:

>  - fix race in usbnet.c (Eugeny S. Mints)


--- linux/drivers/usb/net/usbnet.c.orig
+++ linux/drivers/usb/net/usbnet.c
@@ -3490,6 +3490,8 @@ static void tx_complete (struct urb *urb
 
 	urb->dev = NULL;
 	entry->state = tx_done;
+	spin_lock_rt(&dev->txq.lock);
+	spin_unlock_rt(&dev->txq.lock);
 	defer_bh (dev, skb);
 }


What are these lines fixing again ? It seems rather odd that locking and
then unlocking a mutex could fix anything ..

Daniel

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